(x^2/9)-4x=0

Solution for (x^2/9)-4x=0 equation:

(x^2/9)-4x=0

We add all the numbers together, and all the variables

-4x+(x^2/9)=0

We get rid of parentheses

x^2/9-4x=0

We multiply all the terms by the denominator


x^2-4x*9=0

Wy multiply elements

x^2-36x=0

a = 1; b = -36; c = 0;
Δ = b2-4ac
Δ = -362-4·1·0
Δ = 1296
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{1296}=36$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-36)-36}{2*1}=\frac{0}{2}
=0
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-36)+36}{2*1}=\frac{72}{2}
=36
$