Question

Упростить выражение 
4-6д деленное на 5-2д - 1-5д деленное на 3-3д

Answer 1

$frac{4-6d}{5-2d}-frac{1-5d}{3-3d}=frac{(4-6d)(3-3d)-(1-5d)(5-2d)}{(5-2d)(3-3d)}=\\=frac{12-12d-18d+18d^2-5+2d+25d-10d^2}{(5-2d)(3-3d)}=frac{8d^2-3d+7}{3(1-d)(5-2d)}$