Question

Find the product using suitable identities (x²+4)(x²-4)

Answer 1

(x^2+4)(x^2-4)=(x^2)^2-(4)^2

=x^4-16

[a^2-b^2=(a+b)(a-b)]

Answer 2

Answer:

Identity (a+b) (a–b) =a²– b²

(x²+4) (x²–4) = (x²)² – 4²

=x⁴– 16