Question

-0,4х 2 у(3ху 2 -70ху+15 х 2 у 3 );

Answer 1

Ответ:

$- 0.4x2y(3xy2 - 70xy + 15x2y3) = -0.4 \times 2y(6xy - 70xy + 90xy) = - 0.4x \times 2y \times 26xy = { - 20.8x}^{2} {y}^{2}$