9x2=1296

Solution for 9x2=1296 equation:

9x^2=1296

We move all terms to the left:

9x^2-(1296)=0

a = 9; b = 0; c = -1296;
Δ = b2-4ac
Δ = 02-4·9·(-1296)
Δ = 46656
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{46656}=216$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-216}{2*9}=\frac{-216}{18}
=-12
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+216}{2*9}=\frac{216}{18}
=12
$