00:01
This problem is already in standard form.
00:04
Notice how i wrote this underneath standard form, so it's really easy for us to line up and identify our a, b, and c.
00:11
Our a here, the leading coefficient is 1.
00:14
Remember, if you don't see the number in front of x squared, the number is 1.
00:18
The b value is negative 4.
00:20
Don't forget to include the sign.
00:22
And the c value is negative 5.
00:24
Once again, don't forget to include the sign.
00:26
Our next step is to plug in the information we have.
00:34
So the opposite of b, the opposite of negative 4 is positive 4.
00:41
Minus negative 4 is positive 4.
00:51
Our a is 1, and our c is negative 5.
00:57
It makes it a lot easier if you list those.
01:00
Now we're going to simplify.
01:04
So x equals 4 plus or minus the square root.
01:08
We're going what's on the inside here...