Y=X2-7x+11

Solution for Y=X2-7x+11 equation:

=Y2-7Y+11

We move all terms to the left:

-(Y2-7Y+11)=0

We add all the numbers together, and all the variables

-(+Y^2-7Y+11)=0

We get rid of parentheses

-Y^2+7Y-11=0

We add all the numbers together, and all the variables

-1Y^2+7Y-11=0

a = -1; b = 7; c = -11;
Δ = b2-4ac
Δ = 72-4·(-1)·(-11)
Δ = 5
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$Y_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$Y_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$Y_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(7)-\sqrt{5}}{2*-1}=\frac{-7-\sqrt{5}}{-2}
$
$Y_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(7)+\sqrt{5}}{2*-1}=\frac{-7+\sqrt{5}}{-2}
$