Y=16x-x2-13

Solution for Y=16x-x2-13 equation:

=16Y-Y2-13

We move all terms to the left:

-(16Y-Y2-13)=0

We add all the numbers together, and all the variables

-(+16Y-1Y^2-13)=0

We get rid of parentheses

1Y^2-16Y+13=0

We add all the numbers together, and all the variables

Y^2-16Y+13=0

a = 1; b = -16; c = +13;
Δ = b2-4ac
Δ = -162-4·1·13
Δ = 204
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$Y_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$Y_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

The end solution:

$\sqrt{\Delta}=\sqrt{204}=\sqrt{4*51}=\sqrt{4}*\sqrt{51}=2\sqrt{51}$
$Y_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-16)-2\sqrt{51}}{2*1}=\frac{16-2\sqrt{51}}{2}
$
$Y_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-16)+2\sqrt{51}}{2*1}=\frac{16+2\sqrt{51}}{2}
$