Question

PLEASE HELP. It's SO SIMPLE

What number should be added to the expression x²+2x to change it into a perfect square trinomial?

1
2
4
9

Answer 1

1

Explanation:

i took the test

Answer 2

The answer is choice A) 1

We cut the x coefficient 2 in half to get 1. Then we square 1 to get 1
Note: 1^2 = 1*1 = 1

x^2+2x+1 is a perfect square trinomial that factors to (x+1)^2