Tutors Answer Your Questions about Quadratic Equations (FREE)
Question 986721: a) Is y = x^2 + 7x + 12 a quadratic equation*? Why or why not?
b) Can it be solved by factoring? If yes, solve it. If not, why not?
c) As it happens, the equation y = x^2 + 3x - 23 also cannot be solved by factoring. One method of solving quadratic equations, however, that will solve ALL of them, is called using the quadratic formula. Can you state and explain the quadratic formula?
d) Use the quadratic formula to solve y = x^2 + 3x - 23 and explain your steps.
Click here to see answer by Alan3354(69443)   |
Question 986720: 1. What is the first thing you would do in order to use the quadratic formula to solve this equation?
x^2 + 7x = 9
2. In the following equation, what are the values of a, b, and c?
0 = 5x^2 + 3x - 19
3. Why/how does using the quadratic formula gives us two different roots (or solutions)?
4. Do ALL quadratic equations give us two roots (or solutions)? Explain your answer.
Click here to see answer by Alan3354(69443) |
Question 986737: 1. What is the first thing you would do in order to use the quadratic formula to solve this equation?
x^2 + 7x = 9
2. In the following equation, what are the values of a, b, and c?
0 = 5x^2 + 3x - 19
3. Why/how does using the quadratic formula gives us two different roots (or solutions)?
4. Do ALL quadratic equations give us two roots (or solutions)? Explain your answer.
Thanks!
Click here to see answer by Boreal(15235)  |
Question 986972: a) Is y = x^2 + 7x + 12 a quadratic equation? Why or why not?
b) Can it be solved by factoring? If yes, solve it. If not, why not?
c) As it happens, the equation y = x^2 + 3x - 23 also cannot be solved by factoring. One method of solving quadratic equations, however, that will solve ALL of them, is called using the quadratic formula. Can you state and explain the quadratic formula?
d) Use the quadratic formula to solve y = x^2 + 3x - 23 and explain your steps.
Click here to see answer by Boreal(15235) |
Question 986972: a) Is y = x^2 + 7x + 12 a quadratic equation? Why or why not?
b) Can it be solved by factoring? If yes, solve it. If not, why not?
c) As it happens, the equation y = x^2 + 3x - 23 also cannot be solved by factoring. One method of solving quadratic equations, however, that will solve ALL of them, is called using the quadratic formula. Can you state and explain the quadratic formula?
d) Use the quadratic formula to solve y = x^2 + 3x - 23 and explain your steps.
Click here to see answer by ikleyn(52776)  |
Question 986986: a) Is y = x^2 + 7x + 12 a quadratic equation*? Why or why not?
b) Can it be solved by factoring? If yes, solve it. If not, why not?
c) As it happens, the equation y = x^2 + 3x - 23 also cannot be solved by factoring. One method of solving quadratic equations, however, that will solve ALL of them, is called using the quadratic formula. Can you state and explain the quadratic formula?
d) Use the quadratic formula to solve y = x^2 + 3x - 23 and explain your steps.
Thanks
Click here to see answer by solver91311(24713)  |
Question 987008: a) Is y = x^2 + 7x + 12 a quadratic equation*? Why or why not?
b) Can it be solved by factoring? If yes, solve it. If not, why not?
c) As it happens, the equation y = x^2 + 3x - 23 also cannot be solved by factoring. One method of solving quadratic equations, however, that will solve ALL of them, is called using the quadratic formula. Can you state and explain the quadratic formula?
d) Use the quadratic formula to solve y = x^2 + 3x - 23 and explain your steps.
I really need help with this one!!!!! Thanks
Click here to see answer by josgarithmetic(39616) |
Question 987008: a) Is y = x^2 + 7x + 12 a quadratic equation*? Why or why not?
b) Can it be solved by factoring? If yes, solve it. If not, why not?
c) As it happens, the equation y = x^2 + 3x - 23 also cannot be solved by factoring. One method of solving quadratic equations, however, that will solve ALL of them, is called using the quadratic formula. Can you state and explain the quadratic formula?
d) Use the quadratic formula to solve y = x^2 + 3x - 23 and explain your steps.
I really need help with this one!!!!! Thanks
Click here to see answer by macston(5194)  |
Question 987005: A small rock sits on the edge of a tall building. A strong wind blows the rock off the edge. The distance, in feet, between the rock and the ground tseconds after the rock leaves the edge is given by d=−16t2−5t+470.
If the answer is not an integer, enter it as a decimal. Round to the nearest hundredth
How many seconds after the rock leaves the edge is it 446feet from the ground?How many seconds after the rock leaves the edge does it hit the ground?
Click here to see answer by ankor@dixie-net.com(22740)  |
Question 987005: A small rock sits on the edge of a tall building. A strong wind blows the rock off the edge. The distance, in feet, between the rock and the ground tseconds after the rock leaves the edge is given by d=−16t2−5t+470.
If the answer is not an integer, enter it as a decimal. Round to the nearest hundredth
How many seconds after the rock leaves the edge is it 446feet from the ground?How many seconds after the rock leaves the edge does it hit the ground?
Click here to see answer by macston(5194) |
Question 987168: a rancher wants to use 300 feet of fencing to enclose a rectangular area of 5000 square feet. what dimensions should the rectangle have? What are the dimensions of the rectangular area?
(simplify your answer. use a comma to separate answers as needed)
Click here to see answer by josgarithmetic(39616) |
Question 987354: the floor of a shed has an area of 90 square feet. the floor is in the shape of a rectangle whose length is 3 feet less than twice the width. find the length and the width of the floor of the shed. use the formula area= length x width
Click here to see answer by Boreal(15235) |
Question 987581: Question: The length of a rectangle is 3cm greater than its width. The area of the rectangle is 40cm^2. Find the length and width of the rectangle.
I first tried x+3*x=40cm^2 but as I tried to solve it, it didn't make sense since I got 18.5 cm for the width and 21.5 cm for the length. Please could you help explaining this, thank you.
Click here to see answer by vleith(2983) |
Question 987576: A and B working together can do a job in 10 days. One takes 5 days less than the other to do the job when each works alone. How many days would it take each of them working alone to do the job?
P.S.: My math teacher said that the answer to this question is radicals
Thank you
Click here to see answer by vleith(2983) |
Question 988275: I'm in college and I have a question on my math homework and its asking me for the area of a triangle and all the lengths of the sides and its only telling me that the hypotenuse is 3 cm longer than the long side, and the short side is 3 cm shorter than the long side. can you just show me how to set this up?
Click here to see answer by Cromlix(4381)  |
Question 988251: A circular magnet has an inner radius of r-cm, an outer radius 2cm larger and its depth is the same as the inner radius. If the total volume of the magnet is 120 mulitplied by pi cm^3, find r.
I have written the equation, but cannot solve it.
V= pi x (r+2)^2 x r - pi x r^2 x r
Click here to see answer by ankor@dixie-net.com(22740) |
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