Question

factorise (a-2) (a+2) +3​

Answer 1

Answer:

a^2-1

Step-by-step explanation:

(a-2)(a+2)+3

use the identity [(a+b)(a-b)=a^2-b^2]

so the answer will be

a^2-2^2+3

=a^2-4+3

=a^2-1