Factor out the greatest common factor then simplify if possible (8z-3)(z+4)-(8z-3)(z-3)

Question

anonymous · Answer

I wonder... the greatest common factor is the factor that appears in both terms....
ab + ac 
you factor it out like this
a(b + c)

anonymous · Answer

$$(8z-3)(z+4)-(8z-3)(z-3) $$
$$(8 z^2+29 z-12) - (8 z^2-27 z+9)$$
$$(8 z^2+29 z-12) + (-8 z^2+27 z-9)$$
$$56z - 21$$

anonymous · Answer

Instead of factoring I just foiled each side then subtracted and added.

anonymous · Answer

cant 56z-21 be simplified?

anonymous · Answer

Yeah it does, $$7 (8 z-3)$$

anonymous · Answer

Factoring is easier?
(8z-3)(z+4)-(8z-3)(z-3)
(8z-3)[(z+4)-(z-3)]

anonymous · Answer

the answer is 7(8z-3) correct or just 8z-3

anonymous · Answer

It's the first.^
because you were asked to simplify.

anonymous · Answer

ok

anonymous · Answer

yeah it is  7(8z-3