Question

Помогите с домашкой

Answer 1

Здесь все просто))))))

Answer 2

16-49а^2 = 4^2-(7а)^2 = (4-7а)(4+7а)
4х^2-9а^2=(2х)^2-(3а)^2=(2х-3а)(2х+3а)
1-4в^2 = 1 - (2в)^2 = (1-2в)(1+2в)
100-36а^2 = 10^2-(6а)^2=(10-6а)(10+6а)