Question

5а^3+10а^2-3а-6 СРОЧНО!!! ДАЮ 15 БАЛОВ!

Answer 1

$5a^3+10a^2-3a-6=5a^3-3a+10a^2-6=a\left ( 5a^2-3 \right )+2\left ( 5a^2-3 \right )=\\=(a+3)\left ( 5a^2-3 \right )$