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63x^{2}-90x+70
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63x^{2}-90x+70
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40x+7+63x^{2}-49x-81x+63
Apply the distributive property by multiplying each term of 7x-9 by each term of 9x-7.
40x+7+63x^{2}-130x+63
Combine -49x and -81x to get -130x.
-90x+7+63x^{2}+63
Combine 40x and -130x to get -90x.
-90x+70+63x^{2}
Add 7 and 63 to get 70.
40x+7+63x^{2}-49x-81x+63
Apply the distributive property by multiplying each term of 7x-9 by each term of 9x-7.
40x+7+63x^{2}-130x+63
Combine -49x and -81x to get -130x.
-90x+7+63x^{2}+63
Combine 40x and -130x to get -90x.
-90x+70+63x^{2}
Add 7 and 63 to get 70.
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