Evaluate
10\left(20-x\right)\left(x-8\right)
Expand
-10x^{2}+280x-1600
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-10x^{2}+200x+80x-1600
Apply the distributive property by multiplying each term of x-8 by each term of -10x+200.
-10x^{2}+280x-1600
Combine 200x and 80x to get 280x.
-10x^{2}+200x+80x-1600
Apply the distributive property by multiplying each term of x-8 by each term of -10x+200.
-10x^{2}+280x-1600
Combine 200x and 80x to get 280x.
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