Question

умножение многочленов (5а-7)(3а+1),(3b+7)(4-3b),​

Answer 1

(5а-7)(3а+1)=15а^2-21а+5а-7=15а^2-16а-7

(3b+7)(4-3b)=12b+28-9b^2-21b=28-9b^2-9b