Question

Сократите дробь в^2/в^2+вс
2а+4/а^2-4
Х^2-у^2/х^2-ху

Answer 1

b²/b(b+c)=b/b+c
2(a+2)/(a+2)(a-2)=2/a-2
(x-y)(x+y)/x(x-y)=x+y/x