Question

Factorise the following z^4-16​

Answer 1

Answer:

the answer is described below.

Step-by-step explanation:

z^4 - 16

= (z^2 + 4)(z^2 - 4)

=(z^2 + 4)(z+2)(z-2)(ans)

Answer 2

${z}^{2 } - 16 \\ {z}^{2 } = 16 \\ z = \sqrt{16 } \\ z = 4 \\ z = - 4$