Question

Evaluate these
using identity(a+4) (a_4)​

Answer 1

a^2-4^2
a^2-16 is the answer

....:)

Answer 2

Answer:

a ⁴ −b ⁴ =(a ² ) ²−(b ² ) ²

=(a ²−b ² )(a ² +b ² )

=(a−b)(a+b)(a ²+b ²)

Hence factorised

Formula:

x ² −y ²=(x−y)(x+y)