Asked by Ginny
I need to factor the expression
z^2 + 15z - 54
I think it's either (z - 9)(z + 6) OR
(z - 6)(z + 9)
Can you help me out? Thanks!
z^2 + 15z - 54
I think it's either (z - 9)(z + 6) OR
(z - 6)(z + 9)
Can you help me out? Thanks!
Answers
Answered by
Steve
It's neither.
z^2 + 15z + 54 = (z+6)(z+9)
z^2 - 15z + 54 = (z-6)(z-9)
z^2 + 15z - 54 = (z+18)(z-3)
z^2 + 15z + 54 = (z+6)(z+9)
z^2 - 15z + 54 = (z-6)(z-9)
z^2 + 15z - 54 = (z+18)(z-3)
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