Question

Помогите решить: 7х"-2х+(5+11х-6х")

Answer 1

7х²-2х+(5+11х-6х²)=7х²-2х+5+11х-6х²=х²+9х+5

Answer 2

$7x^2-2x+(5+11x-6x^2)=7x^2-2x+5+11x-6x^2= \\ =(7x^2-6x^2)+(-2x+11x)+5=x^2+9x+5$