169x^2-9=0

Solution for 169x^2-9=0 equation:

169x^2-9=0

a = 169; b = 0; c = -9;
Δ = b2-4ac
Δ = 02-4·169·(-9)
Δ = 6084
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{6084}=78$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-78}{2*169}=\frac{-78}{338}
=-3/13
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+78}{2*169}=\frac{78}{338}
=3/13
$