Question

Expand the ex (13+x)(13-x)

Answer 1

Answer:

169-x^2

Step-by-step explanation:

see according to (a+b) (a-b) = a^2 - b^2

here (13+x) (13-x) = 169-x^2

Answer 2

Answer:

Here we can use an identity

Step-by-step explanation:

(a+b)(a-b)= a²-b²

similarly

(13+x)(13-x)= 13²-x²

=169-x²