16x^2-489=0

Solution for 16x^2-489=0 equation:

16x^2-489=0

a = 16; b = 0; c = -489;
Δ = b2-4ac
Δ = 02-4·16·(-489)
Δ = 31296
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

The end solution:

$\sqrt{\Delta}=\sqrt{31296}=\sqrt{64*489}=\sqrt{64}*\sqrt{489}=8\sqrt{489}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-8\sqrt{489}}{2*16}=\frac{0-8\sqrt{489}}{32}
=-\frac{8\sqrt{489}}{32}
=-\frac{\sqrt{489}}{4}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+8\sqrt{489}}{2*16}=\frac{0+8\sqrt{489}}{32}
=\frac{8\sqrt{489}}{32}
=\frac{\sqrt{489}}{4}
$