9x2-729=0

Solution for 9x2-729=0 equation:

9x^2-729=0

a = 9; b = 0; c = -729;
Δ = b2-4ac
Δ = 02-4·9·(-729)
Δ = 26244
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{26244}=162$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-162}{2*9}=\frac{-162}{18}
=-9
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+162}{2*9}=\frac{162}{18}
=9
$