Question

Помогите пожалуйста.

Answer 1

1
а)(x+|y)/x *x²/a(x+y)=x/a
б)(a-b)(a+b)/b * b/a(a+b)=(a-b)/a
в)$9x ^{10} /y ^{12}$
г)3(a-c)/a*1/(a-c)(a+c)=3/a(a+c)
2
1)1/(x-y)-1/(x+y)=(x+y-x+y)/(x²-y²)=2y/(x²-y²)
2)2y/(x²-y²)*(x²-y²)/y²=2/y