Evaluate
\left(13-x\right)\left(9x+13\right)
Expand
169+104x-9x^{2}
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169+117x-13x-9x^{2}
Apply the distributive property by multiplying each term of 13-x by each term of 13+9x.
169+104x-9x^{2}
Combine 117x and -13x to get 104x.
169+117x-13x-9x^{2}
Apply the distributive property by multiplying each term of 13-x by each term of 13+9x.
169+104x-9x^{2}
Combine 117x and -13x to get 104x.
Examples
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