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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

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
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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

User Mirek Michalak
by
7.0k points

2 Answers

5 votes

Answer:

1

Explanation:

i took the test

User MichaelClark
by
7.8k points
6 votes
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
User Arnaud Denoyelle
by
8.5k points
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