Question

Determine whether the given quadratic equation has roots). If so, find the root (s): z2 + 2z - 8 = 0.​

Answer 1

z^2 + 2z - 8 =0

z^2 + 4z - 2z - 8 =0

z(z - 4) -2(z - 4)=0

(z-4)(z-2)=0

z = 2,4

Answer 2

Answer:

2z + 2z - 8 = 0

4z - 8 = 0

4z = 8

x = 8/4

= 2

Hence the root of the given equation is 2.