Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

Question 734575: need help with quadratic equation
such as
x^2 + 12x -64 = 0
x2 - 2x - 13 = 0
Click here to see answer by lynnlo(4176)

Question 734571: a quadratic function has the following characteristics
x=1 is the equation for the axis of symmetry
x=-1 is an x-intercept
y=-4 is the minimum value
Determine the y-intercept of the parabola
Click here to see answer by josgarithmetic(39616)

Question 734665: Use the discriminate to find the number of real solution to
x^2+3x-4=0
Click here to see answer by Alan3354(69443)

Question 734664: Use the quadratic formula to solve the equation. Give exact answers
x^2+2x=8
Click here to see answer by mananth(16946)

Question 734758: PLEASE HELP!!!

the average speed in still air of a certain plane is 500 km/h. with a constant wind blowing, the plane takes 4 1/6 hour to fly 1040 km into the wind and then return the same distance. what is the speed of the wind?
Click here to see answer by josmiceli(19441)

Question 734928: I am graphing quadratic functions. My equation is f(x)= x^2+5. What do I do?
Click here to see answer by Edwin McCravy(20054)

Question 735026: -3n(2n-5)=0
Click here to see answer by MathLover1(20849)

Question 735212: How do you solve 4x^2 - 4x + 3 = 0 as a India equations explaining each explanation of step by step how you got the answer.
Click here to see answer by lynnlo(4176)

Question 735490: I have an algebra project and one of the questions says " The difference between two perfect squares is 133.What is the smallest possible sum of the two perfect squares? " I found out that the answer is 205, but I don't understand why that is the answer.
Click here to see answer by stanbon(75887)

Question 735729: 3u^2 - 5 = 14u
can someone please solve ASAP
Click here to see answer by rothauserc(4718)

Question 735418: A child throws a ball upward from the roof of a house. The tragctory is parabolic, according to the laws of physics. The height the of the ball above the ground, y in meters is given by the quadratic relation
y=-3x^2+6x+4
a) How high is the roof of the house where the ball is thrown.
b)Complete the square to solve the quadratic equation for the exact values of x when y=0
c) Use the quadratic formula to confirm your answers from part b)
d) Exactly how far away from the house(horizontally) does the ball hit the ground?
e) Use your answers from parts b) and c) and determine the horizontal distance from the house when the ball reaches maximum height.
f) What is the maximum height of the ball?
Click here to see answer by ankor@dixie-net.com(22740)

Question 735861: Can someone please provide me with a breakdown of how to solve this problem? Thanks!
x^2-5=12x
Click here to see answer by richwmiller(17219)

Question 735858: Can someone solve this for me step by step so that I have a better understanding, please?
2x^2-8x-6=0

Click here to see answer by richwmiller(17219)

Question 735687: Find all solutions of the equation and express them in the form
a + bi.
x2 − 9x + 21 = 0
Click here to see answer by richwmiller(17219)

Question 735667: 4x^2 - 4x - 1 = 0

Click here to see answer by richwmiller(17219)

Question 735203: Is it possible to solve the equation 121r^2-64t62?
Click here to see answer by richwmiller(17219)

Question 734966: What is the answer for the equation 6x^2-x-1

Click here to see answer by richwmiller(17219)

Question 734024: Hi all
need help with 5b^2-7b-1=0
Thanks
Click here to see answer by richwmiller(17219)

Question 736013: x^2+5x+2=0
Click here to see answer by mananth(16946)

Question 736089: hi! i'm doing mymaths homework and it says,
write an expression for this rectangle side one x+2 side two x.
I have wrote the expression x squared+2x.
Now it says set up a quadratic equation to describe the situation, then solve it.
Please Help+Thanks!
Erin
Click here to see answer by solver91311(24713)

Question 736320: Hi, we just started the quadratics unit and I don't understand how to tell if a graph represents a quadratic relation. How do you tell?
Click here to see answer by rfer(16322)

Question 736342: write the roots pf the equation in a+bi form
x^2+13=4x
Click here to see answer by MathLover1(20849)

Question 736475: How do I solve x^2=4/25
Click here to see answer by Alan3354(69443)

Question 736573:

let x be equal to a number another number is five less than twice x when the two numbers are multiplied the answer is 7 find two possible values for the number

Click here to see answer by checkley79(3341)

Question 736605: b^2+6b=16
Click here to see answer by lynnlo(4176)

Question 737004: Suppose that the sum of two whole numbers is 10, and the sum of their reciprocals is 5/8. Find the numbers.
Click here to see answer by unlockmath(1688)

Question 736966: How do I solve this quadratic equation by factoring? 2x^2+11x=6
Click here to see answer by jim_thompson5910(35256)

Question 737105: solve the quadratic equation by factoring and applying the property "ab=0 if and only if a=0or b=0
x^2+2kx-8k^2
Click here to see answer by stanbon(75887)

Question 737111: What is the sum of the solutions to the equation 8x^2+2x-3=0
Click here to see answer by reviewermath(1029)

Question 737111: What is the sum of the solutions to the equation 8x^2+2x-3=0
Click here to see answer by josgarithmetic(39616)

Question 737018: A student did a word-processing job for $40. It took him 5 hours longer than he expected, and therefore he earned $4 per hour less than he anticipated. How long did he expect that it would take to do the job?
Click here to see answer by ankor@dixie-net.com(22740)

Question 737208: When we look at a quadratic equation, what is considered the discriminant?

Click here to see answer by jim_thompson5910(35256)

Question 737218: Please help me solve the following equation, "A rectangle is 2 centimeters longer than it is wide. If both the length and width are doubled, its area is increased by 72 square centimeters. Find the dimensions of the original rectangle."
Click here to see answer by lwsshak3(11628)

Question 737254: Hi, my teacher taught me how to do the Tic Tac Toe method to get the binomials for a quadratic, but we have a test sooner than I expected and I'm trying to study and getting frustrated. I was taught to enter from the quadratic in order (from top left to top right)quadratic, constant, then multiply and put the product in the top right. Then you factor vertically for the quadratic and multiplied answer, and do the same for the constant to fit where it makes sense and you can multiply across each horizontal group of 3 and it will work. That's what my notes say and I feel like I'm doing it right but this site says otherwise and I can't find many other sites that have free practice questions.
Click here to see answer by Edwin McCravy(20054)

Question 737245: Buried treasure. Ahmed has half of a treasure map,which indicates that the treasure is buried in the desert 2x + 6 paces from Castle Rock. Vanessa has the other half of the map. Her half indicates that to find the treasure, one must get to Castle Rock, walk x paces to the north, and then walk 2x + 4 paces to the east. If they share their information, then they can find x and save a lot of digging. What is x? help me set it up please .
Click here to see answer by ankor@dixie-net.com(22740)

Question 737406: The function h(t)= -16tsquared+352+368 represents on object in motion fired upward at an initial velocity of 352 ft/sec. The height of the object is represented by h and t represents time in seconds. What is the vertex? Is this is a maximum or minimum?
Click here to see answer by Susan-math(40)

Question 737441: Simplify the following expression. All variables represent positive real numbers
2√20x+3√80x-6√125x
I don't know how to do this.
Click here to see answer by rothauserc(4718)

Question 737495: use factoring to solve
3x^2-10x-8=0
Click here to see answer by MathLover1(20849)

Question 737529: Find the coordinates of the vertex and the intercepts of f(x)=5x^2+17x-12. When necessary, approximate x- intercepts to the nearest tenth.
I'll show what I got so far:
a=5, b=17
x=-b/2a
x=-17/10 x=-1.7
f(-1.7)=5(-1.7)^2+17(-1.7)-12
f(-1.7)=14.45 -28.9 -12
f(-1.7)=-26.45
vertex=(-1.7,-26.5)
Applying the quadratic formula I get the following:
x=(-17+-23)/10
(-4,0)(3/5,0)
Was that correct?
Click here to see answer by lynnlo(4176)

Question 737523: a^2-2a-a=0
Click here to see answer by checkley79(3341)

Question 737584: Hey tutor,
Can you show me how to do this question step by step:
Write a quadratic equation in the form ax^2 +bx+c=0, where a, b, c are integers where the roots of the equations are 1/2 and 3/5
Thanks. If you can, will you please do this step by step.

Click here to see answer by Alan3354(69443)

Question 737579: Hi tutor,
Can you show me how to factor the following step by step:
625-(y-5)^2
Thank you.

Click here to see answer by Alan3354(69443)

Question 737588: Hi tutor, I am stuck in the question written below. Can you please tell to me on how to solve it.
The question:
The relation d=0.0052s^2 + 0.13s models the stopping distance,d, in meters, of a car travelling at a speed of s, in kilometers per hour, when the driver brakes hard. At what speed was a car travelling if its stopping distance is 20m? Round to the nearest tenth.
Can you please show me how to solve this question step by step. Thank you.
Click here to see answer by rothauserc(4718)

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