In this video,
we're gonna solve x squared
minus 11 x plus 28 equals zero
using the quadratic formula.
Subbing in all of our values,
we'll get x equals positive 11
plus or minus the square
root of negative 11 squared
minus four times one times 28
over two times one.
That will then simplify to 11
plus or minus the square
root of nine over two.
So our two answers here
could be x equals 11
plus three over two
or 11 minus three over two.
So 11 plus three gives
us 14 divided by two
will give us x equals seven.
Or 11 minus three is eight
divided by two gives us x equals four.
