Question

Помогите пожалуйста!!!

Answer 1

5х² *(-3х³)² = 5х² * 9х⁶ = 45х⁸

(2х-1)² + (2х+1)(2х-1) = 4х²-4х+1 + 4х²-2х+2х-1 = 8х²-4х = 4х(2х-1)  или

(2х-1)² + (2х+1)(2х-1) = (2х-1)((2х+1)+(2х-1)) = (2х-1)(2х+1+2х-1) = (2х-1)4х

b²c-9c = c(b²-9)

2a²+12a+18 = a²+6a+9 = (a+3)²