1.25x^2-17=0

Solution for 1.25x^2-17=0 equation:

1.25x^2-17=0

a = 1.25; b = 0; c = -17;
Δ = b2-4ac
Δ = 02-4·1.25·(-17)
Δ = 85
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-\sqrt{85}}{2*1.25}=\frac{0-\sqrt{85}}{2.5}
=-\frac{\sqrt{}}{2.5}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+\sqrt{85}}{2*1.25}=\frac{0+\sqrt{85}}{2.5}
=\frac{\sqrt{}}{2.5}
$