What number should be added to the expression x^2+4x to change it into a perfect square trinomial? 1 2 4 8

asked Jan 20, 2018 68.1k views

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What number should be added to the expression x^2+4x to change it into a perfect square trinomial?

1

2

4

8

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3 votes

4 b/c u have to take half your b number (4) and square that, giving u 4

George Brian answered Jan 21, 2018

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2 votes

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

so the answer is 4.

Colby Hill answered Jan 25, 2018

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