Question

what value completes the square for the expression?
x^2-16x

Answer 1

@Jhannybean She has a PhD in completing the square

Answer 2

(x-8)^2 this you asking ?
x^2 -16x +64

Answer 3

I got the answer -64? is that correct, I also thought it was 32. I have no idea

Answer 4

\[x^2-16x \implies (x-8)^2-64\]

Answer 5

\[\color{red}{x^2-16x}\]\[c=\left(\frac{-16}{2}\right)^2 = (-8)^2 = 64\]\[\implies (x^2 -16x+64)+0\]\[\implies (x-8)^2 +0-64\]\[\implies (x-8)^2-64\]