9*4*x=36

Solution for 9*4*x=36 equation:

9*4*x=36

We move all terms to the left:

9*4*x-(36)=0

Wy multiply elements

36x*x-36=0

Wy multiply elements

36x^2-36=0

a = 36; b = 0; c = -36;
Δ = b2-4ac
Δ = 02-4·36·(-36)
Δ = 5184
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{5184}=72$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-72}{2*36}=\frac{-72}{72}
=-1
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+72}{2*36}=\frac{72}{72}
=1
$