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Having difficulties with algebraic manipulation?

Asked by dotlin (422points) August 6th, 2010

(x+6)(3x^2+9x-5)

x(3x^2+9x-5)
3x^3+9x^2–5x

6(3x^2+9x-5)
18x^2+54x-30

so
3x^3+27x^2+49x-30

um what am I doing wrong?

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