Evaluate
10\left(28-x\right)\left(x-6\right)
Expand
-10x^{2}+340x-1680
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280x-10x^{2}-6\left(280-10x\right)
Use the distributive property to multiply x by 280-10x.
280x-10x^{2}-1680+60x
Use the distributive property to multiply -6 by 280-10x.
340x-10x^{2}-1680
Combine 280x and 60x to get 340x.
280x-10x^{2}-6\left(280-10x\right)
Use the distributive property to multiply x by 280-10x.
280x-10x^{2}-1680+60x
Use the distributive property to multiply -6 by 280-10x.
340x-10x^{2}-1680
Combine 280x and 60x to get 340x.
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