00:01
So let's look at the equation, 9x squared plus x equals negative 2.
00:07
We're using the quadratic formula to solve this, so that's x equals minus b plus or minus the square root b squared minus 4a, c all over 2a.
00:15
We're quite ready to use the quadratic formula since we have an equals negative 2, and that needs to be equal 0.
00:21
So we're going to add 2 to both sides.
00:23
So 9x squared plus x plus 2 equals 0.
00:26
A is the coefficient of x squared, which is 9.
00:29
B is the coefficient of x.
00:30
There's nothing written there, but we know there's a 1.
00:32
And c is our constant, which is 2...