Evaluate
10\left(60-x\right)\left(x+10\right)
Expand
6000+500x-10x^{2}
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\left(10+x\right)\left(600-10x\right)
Subtract 30 from 40 to get 10.
6000-100x+600x-10x^{2}
Apply the distributive property by multiplying each term of 10+x by each term of 600-10x.
6000+500x-10x^{2}
Combine -100x and 600x to get 500x.
\left(10+x\right)\left(600-10x\right)
Subtract 30 from 40 to get 10.
6000-100x+600x-10x^{2}
Apply the distributive property by multiplying each term of 10+x by each term of 600-10x.
6000+500x-10x^{2}
Combine -100x and 600x to get 500x.
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