We're gonna solve x squared minus
two x minus 24 equals zero
using the quadratic formula.
So our a will be one,
b will be negative two
and c will be negative 24.
So we'll end up with x equals two plus
or minus the square root
of negative two squared minus four times
one times negative 24
over two times one.
Simplifying that gives us two plus
or minus the square root of a hundred
over two.
Then we have two plus
or minus 10 over two.
So one answer could be
two plus 10 over two.
And our other answer could
be two minus 10 over two.
So two plus 10 is 12.
Divided by two gives us
one answer, x equals six.
Or two minus 10 gives us negative eight.
Divided by two is negative four.
