Question

What is the factored form of
z^2 - 2z - 3

Answer 1

z= 3 and z=-1

D= b^2 - 4ac = 4
z1 = (-b+D)/2a = (2+4)/2x1 = 3
z2 = (-b-D)/2a = (2-4)/2x1 = -1

Answer 2

z=1 z=-3

Explanation:

take z^2 times it to -3 then factor for -2 and reverse the answer