Evaluate
\left(49-x\right)\left(x-7\right)
Expand
-x^{2}+56x-343
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\left(49-x\right)\left(x-7\right)
Calculate 7 to the power of 2 and get 49.
49x-343-x^{2}+7x
Apply the distributive property by multiplying each term of 49-x by each term of x-7.
56x-343-x^{2}
Combine 49x and 7x to get 56x.
\left(49-x\right)\left(x-7\right)
Calculate 7 to the power of 2 and get 49.
49x-343-x^{2}+7x
Apply the distributive property by multiplying each term of 49-x by each term of x-7.
56x-343-x^{2}
Combine 49x and 7x to get 56x.
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