441=9x*X

Solution for 441=9x*X equation:

441=9x*x

We move all terms to the left:

441-(9x*x)=0

We add all the numbers together, and all the variables

-(+9x*x)+441=0

We get rid of parentheses

-9x*x+441=0

Wy multiply elements

-9x^2+441=0

a = -9; b = 0; c = +441;
Δ = b2-4ac
Δ = 02-4·(-9)·441
Δ = 15876
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{15876}=126$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-126}{2*-9}=\frac{-126}{-18}
=+7
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+126}{2*-9}=\frac{126}{-18}
=-7
$