Evaluate
2\left(100-x\right)\left(x-40\right)
Expand
-2x^{2}+280x-8000
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-2x^{2}+80x+200x-8000
Apply the distributive property by multiplying each term of -2x+200 by each term of x-40.
-2x^{2}+280x-8000
Combine 80x and 200x to get 280x.
-2x^{2}+80x+200x-8000
Apply the distributive property by multiplying each term of -2x+200 by each term of x-40.
-2x^{2}+280x-8000
Combine 80x and 200x to get 280x.
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