What is the constant that should be added to the binomial so that it becomes a perfect square trinomial? x^2+18x

Question

What is the constant that should be added to the binomial so that it becomes a perfect square​ trinomial? x^2+18x

Wai C. · Accepted Answer

The constant is 81.X^2 +18X +81 = (X+9)(X+9)                          = (X+9)^2The end.

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