Question

Which value is needed to create a perfect square trinomial from the expression x2 + 8x + _____?

Answer 1

https://media.edgenuity.com/evresources/3109/3109-09/3109-09-05/3109-09-05-assessment/3109-09-05-01.png

Answer 2

x^2+8x+...
= x^2+2(4)+...
= x^2+2(4)+(...)^2

Answer 3

wich one is it

Answer 4

You can finish it by yourself.
Hint : (x+a)^2 = x^2 + 2ax + a^2

Answer 5

Here is an easy way to do it:

Take the second term (the x term), half it, and and then square that.
For example:
x^2+6x+?
6/2=3
3^2=9
so x^2+6x+9