X^2=1,8y

Solution for X^2=1,8y equation:

X^2=1.8X

We move all terms to the left:

X^2-(1.8X)=0

We add all the numbers together, and all the variables

X^2-(+1.8X)=0

We get rid of parentheses

X^2-1.8X=0

a = 1; b = -1.8; c = 0;
Δ = b2-4ac
Δ = -1.82-4·1·0
Δ = 3.24
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$X_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$X_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$X_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-1.8)-\sqrt{3.24}}{2*1}=\frac{1.8-\sqrt{3.24}}{2}
$
$X_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-1.8)+\sqrt{3.24}}{2*1}=\frac{1.8+\sqrt{3.24}}{2}
$