What value of B makes the expression, x^2 Bx 81 a perfect square trinomial?

Algebra
Tutor: None Selected Time limit: 1 Day

A.20 B.18 C.8 D. 4

May 12th, 2015

I am assuming there are addition signs between the terms.  In that case, the answer is "B" (18)

May 12th, 2015

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May 12th, 2015
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May 12th, 2015
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