Question

Exalute using identities :(x-5) (x+5) (x2 +2.5)

Answer 1

Step-by-step explanation:

given (x-5)(x+5)(x^2+25)

using the identity (a+b)(a-b) = a^2 - b^2,

(x-5)(x+5) = x^2 - 5^2

= x^2 - 25

using the same identity ,

(x^2-25)(x^2+25)=(x^2)^2 - 25^2

= x^4 - 625