Mathematics
Junior High

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(4) x²+2xy-2xz-3y² +2yz

Answers

x^2+2xy-2xz-3y^2+2yz
=x^2+2xy—3y^2-2xz+2yz
=(x+3y)(x-y)-2z(x-y)
=(x-y)(x+3y-2z)

^2は2乗を表しています。

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