Question

Упростите выражение 3a(2a+a2)-4a(a2-7a)

Answer 1

Объяснение:

$3a(2a + a {}^{2} ) - 4a(a {}^{2} - 7a) = 6a {}^{2} + 3a {}^{3} - 4a(a {}^{2} - 7a) = 6a {}^{2} + 3a {}^{3} - 4a {}^{3} + 28a {}^{2} = 6a {}^{2} - a {}^{3} + 28a {}^{2} = 34a {}^{2} - a {}^{3}$