00:01
Hello, so here we have on the equation x squared minus 6x minus 11 is equal to zero.
00:05
So we have a quadratic here in standard form, ax squared plus bx plus c equals a zero.
00:10
So therefore we know that x then is going to be equal to while negative b, so minus a negative 6 is positive 6 plus or minus the square root of b squared minus 4ac.
00:20
So negative 6 squared is 36 minus 4 times a, which is just 1 times c, which is going to be negative 11.
00:28
I'm all divided by 2a, such as 2 times 1.
00:32
So, therefore, here, x is equal to, well, 6 plus or minus the square root of, so we get 36 minus 4 times a negative 11.
00:42
So we can do 4 times while negative 11 is negative 44.
00:48
So we have 36 minus negative 44.
00:51
It's 36 plus 44, which is going to be 80.
00:55
So you have 6 plus or minus the square root of 80.
00:58
All divided by two.
01:01
So therefore we continue here.
01:03
We get six over two, which is just three.
01:05
And then we get three plus or minus, plus or minus the square root of 80 over two...