Question

Obtain the factors of z2–4z -12

Answer 1

Answer:

Correct factors are 6 and -2 of equation z²-4z-12

Step-by-step explanation:

z²-4z-12 = 0

z²-6z+2z-12 = 0

z(z-6) + 2(z-6) = 0

(z-6) (z+2) = 0

1st case and 2nd case

z-6 = 0 z+2 = 0

z+2 z-6

z-6=0 and z+2 = 0

z=0+6. z=0-2

z= 6 z= -2