Question

let's factorise:
x to the power four - 1​

Answer 1

Answer:

$x {}^{4} - 1 \\ = x {}^{2}(x {}^{2} ) - 1 \\ = x {}^{2} (x {}^{2} - 1 {}^{2}) \\ = x {}^{2} (x + 1)(x - 1)$

Answer 2

(｡◕‿◕｡)

Answer :

x^4 - 1

= x^2 (x^2) - 1

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

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