Expand
21x^{2}+22x-63
Evaluate
\left(7x-9\right)\left(3x+7\right)
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21x^{2}+49x-27x-63
Apply the distributive property by multiplying each term of 7x-9 by each term of 3x+7.
21x^{2}+22x-63
Combine 49x and -27x to get 22x.
21x^{2}+49x-27x-63
Apply the distributive property by multiplying each term of 7x-9 by each term of 3x+7.
21x^{2}+22x-63
Combine 49x and -27x to get 22x.
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