Question

(13+x)(13-x) what is the answer?

Answer 1

Given, (13-x)(13+x)
We know that,
(a+b)(a-b)= a^2-b^2
Therefore,
(13-x)(13+x)= 13^2-x^2
= 169- x^2

Answer 2

= 169 - 13x + 13x - x^2
= 169 - x^2....…