Question

Упрости выражение ( 4 a 4 − 3 b ) ⋅ 2 b − 3 b ⋅ ( 9 a 4 − 4 b )

Answer 1

=8b*a^4 - 6b^2 - 27b*a^4 + 12b^2= -19b*a^4 + 6b^2= -b(19a^4 - 6b)