Question

(х-1)(х+1)+(х-3)(х+1)

Answer 1

(х-1)(х+1)+(х-3)(х+1)=x²+x-x-1+x²+x-3x-3=2x²-2x-4
ОТВЕТ:2x²-2x-4

Answer 2

Expanding the expression, we get:

(х-1)(х+1)+(х-3)(х+1) = х² - 1 + х + х² - 3х - 3 + х + 1

Simplifying the terms, we get:

2х² - 2х - 2

So the final answer is:

2х² - 2х - 2