Question

СРОЧНО!!! Даю 50 баллов!
Сократить дроби:
1 $\frac{ab^{2}-ac^{2} }{c^{2}-bc }$
2 $\frac{x^{4}-x^{2} y^{2} }{ay^{2} -axy}$

Answer 1

1)

$\frac{ab^2-ac^2}{c^2-bc} =\frac{a(b^2-c^2)}{c(c-b)} =-\frac{a(b-c)(b+c)}{c(b-c)} =-\frac{a(b+c)}{c}$

2)

$\frac{x^4-x^2y^2}{ay^2-axy}=\frac{x^2(x^2-y^2)}{ay(y-x)} =-\frac{x^2(x-y)(x+y)}{ay(x-y)} =-\frac{x^2(x+y)}{ay}$