Question

Factorise the following expression-



x raise to the power 4

– 16​

Answer 1

Answer:

X ^4 - 16

(X^2)^2 - (4)^2

Taking roots

X^2 - 4

X = +-root over 4

Answer 2

Answer:

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

Step-by-step explanation:

$x^4-16\\=(x^2)^2-4^2\\=(x^2-4)(x^2+4)\\=(x^2-2^2)(x^2+4)\\=(x-2)(x+2)(x^2+4)$