When is "completing the square" used? All of my math books say it is used to make a quadratic equation factorable and a perfect square.
This is my problem:
"Write the function, f(x) = -2x^2 - 4x + 15
in the standard form, f(x) = a ( x - h)^2 + k
I seem to remember that you use completing the square for this, but I can't find it anywhere. If I am wrong, then what else should I use? I am going to double check my work before I post where I think I am going wrong.
As always, thank you.
This is my problem:
"Write the function, f(x) = -2x^2 - 4x + 15
in the standard form, f(x) = a ( x - h)^2 + k
I seem to remember that you use completing the square for this, but I can't find it anywhere. If I am wrong, then what else should I use? I am going to double check my work before I post where I think I am going wrong.
As always, thank you.