Question

Помогите с домашкой. Один маленький пример

Answer 1

1)(2x-3y)/(x²-y²) - (2x-3y)=(2x-3y)(1-x²+y²)/(x²-y²)
2)3(x-y)/(2x-3y) *(2x-3y)(1-x²+y²)/(x-y)(x+y)=(3-3x²+3y²)/(x+y)
3)3/(x+y)-(3-3x²+3y²)/(x+y)=(3-3+3x²-3y²)/(x+y)=3(x-y)(x+y)/(x+y)=3x-3y