Question

分式约分a-b/a^2+ab乘a^2b^2-a^4/ab-a^2.x^2-3x/x^2-6x+9乘x^2-11x+30/

Answer 1

1、(a-b)/a(a+b) ×a²(a+b)(a-b)/[-a(a-b)]

=-(a-b)

=b-a

2、x(x-3)/(x-3)²×(x-5)(x-6)/x(x-5)

=(x-6)/(x-3)

3、-(x+4)(x-4)/(x-3)(x+1)×(x-3)/(x-1)(x-4)

=-(x+4)/(x+1)(x-1)

=(x+4)/(1-x²)