Question

Упростите выражение
(5a+4b)2( В КВАДРАТЕ)- (3a-в) (7а – 16в)=
ДАЮ 30 БАЛЛОВ

Answer 1

(5a+4b)^2-(3a-b)(7a-16b)=25a^2+40ab+16b^2-(21a^2-48ab-7ab+16b^2=25a^2+40ab+16b^2-(21a^2-55ab+16b^2=25a^2+40ab+16b^2-21a^2+55ab-16b^2=4a^2+95ab