Evaluate
2\left(65-x\right)\left(x+20\right)
Expand
2600+90x-2x^{2}
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2600+130x-40x-2x^{2}
Apply the distributive property by multiplying each term of 65-x by each term of 40+2x.
2600+90x-2x^{2}
Combine 130x and -40x to get 90x.
2600+130x-40x-2x^{2}
Apply the distributive property by multiplying each term of 65-x by each term of 40+2x.
2600+90x-2x^{2}
Combine 130x and -40x to get 90x.
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