# Questions on Algebra: Quadratic Equation answered by real tutors!

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 Quadratics: solvers Practice! Answers archive Lessons Word Problems In Depth

## Tutors Answer Your Questions about Quadratic Equations (FREE)

 Question 236187: x^-x=1 what is the solution set{ }? quadratic formula. Click here to see answer by jim_thompson5910(28598)

 Question 236208: 4y^2-7y-15=0 Click here to see answer by jim_thompson5910(28598)

 Question 236220: use quadractic equation to find the x intercept if any. then evaluate the function for several values of x. f(x)=-x^2-2x-1 Click here to see answer by checkley77(12569)

 Question 236217: find the vertex, the line of symmetry and the maximum or minimum value of f(x). Graph the function f(x)=1/2(x+6)^2+3 Click here to see answer by stanbon(57412)
 Question 236217: find the vertex, the line of symmetry and the maximum or minimum value of f(x). Graph the function f(x)=1/2(x+6)^2+3 Click here to see answer by Edwin McCravy(8916)

 Question 236327: solve the quadratic equation by using the square root property. 4(a-5)^2=1 Click here to see answer by Theo(3468)

 Question 236463: Please help me solve these: 5 x squared + 9x - 1 = 0 4 x sq + 12x + 7 = 0 Click here to see answer by jim_thompson5910(28598)

 Question 236462: Find an equation of the line containing the given pair of points. Express your answer in the form x=a, y=b, or y=mx+b, (-6,-6) and (5,5) what is an equation of the line? I'm having a hard time understanding it, can you please help me slove and understand the equation?? Thank you! :)) Click here to see answer by jim_thompson5910(28598)

 Question 236448: please help me solve this equation Click here to see answer by jim_thompson5910(28598)

 Question 236478: How do you turn this equation to standard form and what are the steps to get it to the answer? Click here to see answer by jim_thompson5910(28598)

 Question 236480: Please help me with this problem: The sum of the roots of the equation x squared -20x + 9 = 0 is______________________ The product of its roots is____________________________ Thank you very much. Carrie Click here to see answer by user_dude2008(1861)
 Question 236480: Please help me with this problem: The sum of the roots of the equation x squared -20x + 9 = 0 is______________________ The product of its roots is____________________________ Thank you very much. Carrie Click here to see answer by JimboP1977(308)

 Question 236442: Will someone please help me solve this problem: The difference between two numbers is 3. Their product is 180. What are the numbers? Thank you. Click here to see answer by JaspersHeart(2)

 Question 236529: I am using this sight to figure out quadratic equations, but I am not sure what a certain symbol is that is being used. Here is the equation: x= [-12 +- sqrt (144.4-4* -0.2*11)]/(-0.4) x= [-12 +- sqrt (152.8)]/(-0.4) My question is what does the star stand for to make it come out to 152.8? Click here to see answer by checkley77(12569)
 Question 236529: I am using this sight to figure out quadratic equations, but I am not sure what a certain symbol is that is being used. Here is the equation: x= [-12 +- sqrt (144.4-4* -0.2*11)]/(-0.4) x= [-12 +- sqrt (152.8)]/(-0.4) My question is what does the star stand for to make it come out to 152.8? Click here to see answer by scott8148(6628)

 Question 236647: Solve: x^2 - x + 49 = 0 since b^2-4ac is negative, this has imaginary roots. I would like to know if there is a better/easier way to solve this and such quadratics..many thanks Click here to see answer by jim_thompson5910(28598)

 Question 236762: Hello, I have had some difficulty with this problem and would very much appreciate some help with it. I am sorry, but, as I do not know how to make an exponent on my keyboard, the exponents will be signified by asterisks. The number of asterisks following a number will signify the value of the exponent. Thank you, x***-6x**+8x-48 Click here to see answer by scott8148(6628)

 Question 236763: Hello, I have had some difficulty with this problem and would very much appreciate some help with it. I am sorry, but, as I do not know how to make an exponent on my keyboard, the exponents will be signified by asterisks. The number of asterisks following a number will signify the value of the exponent. Thank you, x***-6x**+8x-48 Click here to see answer by scott8148(6628)

 Question 236764: Hello, I have had some difficulty with this problem and would very much appreciate some help with it. I am sorry, but, as I do not know how to make an exponent on my keyboard, the exponents will be signified by asterisks. The number of asterisks following a number will signify the value of the exponent. Thank you, Factor: x***-6x**+8x-48 Click here to see answer by scott8148(6628)

 Question 236775: Hello, I have looked at this prblem for almost two hours and I can't figure how to form the quadratic! Problem: You can see 30 widgets at \$500 per year. Furthermore, you find that for each \$25 decrease in price you can sell 3 more wigdets. At what price should you sell the widgets to maximize gross income and what will that price be. I did the long way by sub. in 25 increments and adding 3 to amount sold I came up with Gross income max = \$16,875 if you sell for \$375 ea. How do I work the equation to get in quadratic form from the beginning? Thanks - Kristen Click here to see answer by scott8148(6628)

 Question 236845: Please help me solve this problem: Find k to make the trinomial a perfect square: r square + 10r + k Thank you, Carrie Click here to see answer by jim_thompson5910(28598)

 Question 236907: Solve using quadratic equations: a) x² + 3x = 10 b) 4 x² + 12x = 40 c) 4 x² + 12x + 9 = 40 + 9 d) 4 x² + 12x + 9 = 49 Click here to see answer by nyc_function(2733)

 Question 236898: 40'x 80' rectangular lot...2 boys mowing one decided that will stop at a uniform distance ..moving using the collapsing pattern....what uniform distance should one stop mowing Click here to see answer by edjones(7569)

 Question 236844: Please help me solve this problem: Find k to make the trinomial a perfect square: r square + 10r + k Thank you, Carrie Click here to see answer by scott8148(6628)

 Question 236902: what is the effect of the dsicriminanat on the solutions of a quadratic equation. what is the advantge of using the quadratic formula versus other methods to solve quadratic equations? Click here to see answer by thrasherlax74(11)

 Question 237081: finding complex solution x^2+2=0 Click here to see answer by solver91311(16897)

 Question 237072: how do i find the complex, rational, or real zeros in the equation 1/3x^3+ 1/2x^2 -6x Click here to see answer by solver91311(16897)

 Question 237119: hello my teacher assigned my class a project, and we have to solve this equation for y: (X^2+y^2)^2-8X(X^2-3Y^2)+18(X^2+Y^2)=27 thank you for your help. Click here to see answer by Alan3354(30993)

 Question 237296: write the quadratic f(x)=2x^2+8x-2 in standard form. I got f(x)=(2x^2+4)-4-2, do I go further? Click here to see answer by edjones(7569)

 Question 237294: x + 10 = 3(x - 1)2 Click here to see answer by edjones(7569)

 Question 237389: Please help me! Anne Pelletier won a bronze medal in the women's springboard competition at the 1996 Summer Olympics in Atlanta. Pelletier somersaults from a 3 m springboard. Her height, h metres, above the water t seconds after she leaves the board is given by . How long is it until Pelletier reaches the water? How high is she after 0.5 seconds? Thank you! Click here to see answer by ankor@dixie-net.com(15661)

 Question 237411: how do you factor 4c^2+4c-3 Click here to see answer by stanbon(57412)

 Question 237415: For what value of K will the roots of the Equation 2x^2-4x+K=0 be REAL AND EQUAL??? Click here to see answer by stanbon(57412)

 Question 237433: 81t^2 = 49 Click here to see answer by jim_thompson5910(28598)

 Question 237451: Can I get 81t^2 = 49 work with Square root property Click here to see answer by solver91311(16897)

 Question 237494: Quadratic Equation Z^2-4z+3=0 I worked it this way but can get the right answer can you tell me what I am doing wrong? Z^2 - 4z + 3 = 0 a=Z b=-4 c=3 z = 4+- Ѵ4^2-4(z) (3) over 2(z) z=4+4+- Ѵ4 over 2 answer in back of book 1, 3 Click here to see answer by scott8148(6628)

 Question 237505: What is the difference between: 1/x-3 and x+3/x^+9 Click here to see answer by stanbon(57412)

 Question 237521: X^2 + 3-2=0 Click here to see answer by checkley77(12569)
 Question 237521: X^2 + 3-2=0 Click here to see answer by College Student(505)

 Question 237504: What is the average of the 2 solutions for the general equation ax^+b+c=0 How can this be useful when checking answers? Click here to see answer by Earlsdon(6287)

 Question 237525: what is the line of a quadratic equation? Click here to see answer by unlockmath(1603)

 Question 237535: z ( Z-9) = -2 Click here to see answer by edjones(7569)

 Question 237615: z(z-9)=-20 Click here to see answer by nyc_function(2733)
 Question 237615: z(z-9)=-20 Click here to see answer by College Student(505)

 Question 237493: What value of K will the roots of the equation 2x^2-3x+K=0 be imaginary? Click here to see answer by Theo(3468)

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