What is x213 expanded What is x213 expanded What is x213 exp

Solution

(x^2 - 1)^3

Using the property : (a-b)^3 = a^3 - b^3 - 3ab(a-b)

a = x^2 b = 1

(x^2 - 1)^3 = (x^2)^3 - (1)^3 - 3*x^2 *1 ( x^2 -1)

= x^6 - 1 - 3x^2(x^2-1)

= x^6 -1 - 3x^4 + 3x^2

= x^6 - 3x^4 + 3x^2 -1