Question

which of the following is a factor of z2 -4z-12? ​

Answer 1

Step-by-step explanation:

${z}^{2} - 4z - 12$

$= {z}^{2} - (6 - 2)z - 12$

$= {z}^{2} - 6z + 2z - 12$

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

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