(3а+4)²=....,Б)(2х-в)²=

Question

(3а+4)²=....,Б)(2х-в)²=

Comments

срочно нужно

Answer 1

(3а+4)²=9a²+24a+16
(2х-b)²=4x²-4xb+b²

Answer 2

А) (3a+4)^2= (3a+4)(3a+4)=9a^2+12a+12a+16= 9a^2+24a+16
b) (2x-b)^2= (2x-b)(2x-b)=4x^2-2bx-2bx+b^2=4x^2-4bx+b^2=-4bx+4x^2+b^2=-4bx+b^2+4x^2=b^2-4bx+4x^2