The factorisation of z^ 2 -4 z-12 is - Vidyadip

MCQ

The factorisation of $z^{2}-4 z-12$ is

A
$(z+6)(z+2)$
B
$(z-6)(z-2)$
✓
$(z-6)(z+2)$
D
$(z+6)(z-2)$

✓

Answer

Correct option: C.

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

c
$z^{3}-4 z-12$
$=z^{2}-6 z+2 z-12$
$=z(z-6)+2(z-6)$
$=(z-6)(z+2)$

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