We are going to label
our a, b, and c values,
so that we can plug it
into the quadratic formula
that's in the top right-hand corner.
This is going to give up nine plus
or minus the square root of 81
plus 144 all over four.
If we simply this, we're
going to get nine plus
or minus the square root
of 225 all over four.
The square root of 225 is 15.
So, this will give us
nine plus or minus 15
all over four.
Nine plus 15 over four is going
to give and answer of six.
Or nine minus 15 over four is going
to give us an answer of
negative three over two.
