Question

计算(1)2x-6/x2-4x+4乘2x-4/x-3(2)a²+2ab+b²/ab-b²除

Answer 1

1 =2(x-3)/(x-2)^2*2(x-2)/(x-3)=4/(x-2)

2 =(a+b)^2/(b(a-b))*a(a-b)/(b(a+b))=a(a+b)/b^2