9(x)^(2)=441

Solution for 9(x)^(2)=441 equation:

9(x)^(2)=441

We move all terms to the left:

9(x)^(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
$