Помогите спс ............

Question

Помогите спс ............

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Answer 1

А) = 2x^2 / 5y
б) = 2(b+9) / (b+9)^2= 2 / b+9
в) = (y-1)^2 / (1-y)(1+y)= 1-y  /  1+y

Answer 2

А) =2х^2/5y
б) =2(b+9)/(b+9)^2=2/b+9
в) =(y-1)^2/(1-y)(1+y)= 1-y/1+y