Question

$frac{56a}{b^2-ab} * frac{a-b}{a^2} при а=0.7 b=0.8$

Answer 1

$frac{56a}{b^2-ab}* frac{a-b}{a^2}= frac{56a(a-b)}{b(a-b)*a^2}= frac{56}{ab} \\a=0,7;; ; b=0,8\\ frac{56}{0,7*0,8}= frac{56}{0,56}=100$