Question

Помогите, 100 баллов даю.

Answer 1

1
2x/(x-y)+7x²/[(x-y)(x+y)]=(2x²+2xy+7x²)/(x²-y²)=(9x²+2xy)/(x²-y²)
2
3a(1-2b)/a^4b³*2a²b/[(1-2b)(1+2b)]=6/ab²(1+2a)