(x-9)(x+6)=?

How do you work this out? I can do the sums like (2x+7)(3x+4) and (5x-2)(4x-1) but I cannot do it when you merge the sums together[-/+]
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1 Answer

(x-9)(x+6)=x(x+6)-9(x+6)=x^2+6x-9x-54=x^2-3x-54, because 6-9=-3.
by Top Rated User (1.2m points)

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