Question

Упростите выражение: 3ab2(4a3−6ab+13b).

Answer 1

Ответ:

$3ab {}^{2} (4a {}^{3} - 6ab + 13b) = 3ab {}^{2} (4a {}^{3} ) + 3ab {}^{2} ( - 6ab) + 3ab {}^{2} (13b) = 3a {}^{4} b {}^{2} \times 4 + 3a {}^{2} b {}^{2} ( - 6b) + 3ab {}^{3} \times 13 = 12a {}^{4} b {}^{2} - 18a {}^{2} b {}^{3} + 39ab {}^{3}$