Evaluate
10\left(50-x\right)\left(x-20\right)
Expand
-10x^{2}+700x-10000
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500x-10x^{2}-10000+200x
Apply the distributive property by multiplying each term of x-20 by each term of 500-10x.
700x-10x^{2}-10000
Combine 500x and 200x to get 700x.
500x-10x^{2}-10000+200x
Apply the distributive property by multiplying each term of x-20 by each term of 500-10x.
700x-10x^{2}-10000
Combine 500x and 200x to get 700x.
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