Упростить дробь.....

Question

Упростить дробь.....

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Answer 1

1) x^2+xy-2y^2=x^2-2xy+y^2+3xy-3y^2=(x-y)^2+3y(x-y)=(x-y)(x-y+3y)=(x-y)(x+2y)

2) (x-y)(x+2y)/(x-y)=x+2y