SOLUTION: what is the missing number of this perfect square equation: p^2+9p+?

SOLUTION: what is the missing number of this perfect square equation: p^2+9p+?

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Question 846174: what is the missing number of this perfect square equation: p^2+9p+?
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
Take half of the coefficient and square it.

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