Question

what are the solutions to z^2 -6z-27=0

Answer 1

-9, -3

Answer 2

What have you done so far with the question @minimoo

Answer 3

factored it out to be (z-9)(z+3)

Answer 4

Yep that's good. Now you have this:
\[(z-9)(z+3)=0\]
What values of z make the equation zero?

Answer 5

it would be z-9=0 and z+3=0 and the answers would be 9 and -3

Answer 6

Well Done! That's correct.

Answer 7

:) im getting the hang of it!

Answer 8

Yep, you don't need to fret about this too much because if you try attempting it, you would be likely to get it right! ;)

Answer 9

thanks again :)