Mathematics
Junior High

【至急】この解き方が分からないので、教えてください🙏

(x-7y)²-9(x-7y)-22=(x-y+ に)(x- ぬ ]y-ねの
数学 因数分解 解き方

Answers

x-7y=Mとおくと
(与式)=M²-9M-22
=(M+2)(M-11)
=(x-7y+2)(x-7y-11)

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