Question

(X+1)(x-1)(x^2-1) pls help me with this sum
Pls give me the solution

Answer 1

(x^2-1)(x^2-1)

(x^2-1)^2

Answer 2

$(x +1)(x-1)(x^2-1)$

Applying identity (a + b) (a - b) = a² - b² .

$=(x^2-1^2)(x^2-1)\\=(x^2-1)(x^2-1)\\=(x^2-1)^2$

Applying identity (a - b)² = a² + b² - 2ab .

$=(x^2)^2+(1)^2-2.x^2.1\\=x^4+1-2x^2$