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## anonymous one year ago What value of B makes the expression, x^2 + Bx +64 a perfect square trinomial? 16 8 4 2

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1. anonymous

@imqwerty

2. anonymous

my answer is 4.

3. imqwerty

u have- $x^2 +Bx+64$$x^2+\frac{ 2Bx }{ 2}+8^2$ and the square of (a+b) when opened is ->a^2 +2ab+b^2 comparing it with what we have we just need to make B/2 as 8 so B/2=8 B=16

4. anonymous

Thank u

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