5x2=x2-2x

Solution for 5x2=x2-2x equation:

5x^2=x2-2x

We move all terms to the left:

5x^2-(x2-2x)=0

We add all the numbers together, and all the variables

5x^2-(+x^2-2x)=0

We get rid of parentheses

5x^2-x^2+2x=0

We add all the numbers together, and all the variables

4x^2+2x=0

a = 4; b = 2; c = 0;
Δ = b2-4ac
Δ = 22-4·4·0
Δ = 4
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{4}=2$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(2)-2}{2*4}=\frac{-4}{8}
=-1/2
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(2)+2}{2*4}=\frac{0}{8}
=0
$