Question

What value completes the square for the expression?

Answer 1

\[x ^{2}-16x\]

Answer 2

it is square of x-8
(x-8)^2=x^2-16x+64
so add 64

Answer 3

the answer is 64?

Answer 4

\[x^2-16x=0\]this?

Answer 5

yea

Answer 6

ok thanks!

Answer 7

\[x^2-16x+8^2=0+8^2\]think of it like this.

Answer 8

The easy way to do it, for\[\Large ax^2 + bx\] is to divide b by 2, and square it:\[\Large \left( \frac{ b }{ 2 } \right)^2\] and you add that to both sides of the equation.