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What number should be added to the expression x^2 + 6x to change it into a perfect square trinomal

User Siwel
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1 Answer

1 vote
Hello.

The correct is answer is 9.

You have to do half of 6 (3) and then square it that equals 9

So it should be x^2 + 6x +9

Have a nice day
User UncleBob
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