Question

Упростите выражение:
1)$x- frac{x}{x+1}$
2)$frac{m+2}{4m} - frac{1}{m+4}$

Answer 1

1
x-x/(x-1)=(x²+x-x)/(x+1)=x²/(x-1)
2
(m+2)/4m-1/(m+4)=(m²+4m+2m+8-4m)/[4m(m+4)]=((m²+2m+8)/[4m(m+4)]