Evaluate
20\left(32-x\right)\left(x-9\right)
Expand
-20x^{2}+820x-5760
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640x-20x^{2}-5760+180x
Apply the distributive property by multiplying each term of x-9 by each term of 640-20x.
820x-20x^{2}-5760
Combine 640x and 180x to get 820x.
640x-20x^{2}-5760+180x
Apply the distributive property by multiplying each term of x-9 by each term of 640-20x.
820x-20x^{2}-5760
Combine 640x and 180x to get 820x.
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