Question

Сократите дробь: а) 12аб/4а б) 3с(1-с)/9с^2(с-1) ДАМ 15 БАЛОВ

Answer 1

$1)\frac{12ab}{4a}=\frac{4a*3b}{4a}=\boxed{3b}\\\\\\2)\frac{3c(1-c)}{9c^{2}(c-1) }=-\frac{3c(c-1)}{3c*3c*(c-1)}= \boxed{-\frac{1}{3c}}$