Question

Выполните действия
a) 3/8 a^3 b^2 × 6ab^2 × ( -4b)
б) 9a^2 b^3 c ÷ (6/5 ac)

Answer 1

$1) frac{3}{8} a^3b^2*6ab^2*(-4b)=- frac{3}{2} a^3b^2*6ab^2b=-3a^3b^2*3ab^2b=-9a^4b^5$
$2) 9a^2b^3c:( frac{6}{5} ac)= frac{9a^2b^3c}{ frac{6}{5} ac} = frac{9ab^3}{ frac{6}{5} } = frac{9ab^3*5}{6} = frac{3ab^3*5}{2} = frac{15ab^3}{2}$