6a-6=a^2+1

Solution for 6a-6=a^2+1 equation:

6a-6=a^2+1

We move all terms to the left:

6a-6-(a^2+1)=0

We get rid of parentheses

-a^2+6a-1-6=0

We add all the numbers together, and all the variables

-1a^2+6a-7=0

a = -1; b = 6; c = -7;
Δ = b2-4ac
Δ = 62-4·(-1)·(-7)
Δ = 8
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$a_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$a_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

The end solution:

$\sqrt{\Delta}=\sqrt{8}=\sqrt{4*2}=\sqrt{4}*\sqrt{2}=2\sqrt{2}$
$a_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(6)-2\sqrt{2}}{2*-1}=\frac{-6-2\sqrt{2}}{-2}
$
$a_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(6)+2\sqrt{2}}{2*-1}=\frac{-6+2\sqrt{2}}{-2}
$