0,25x^2-1=16

Solution for 0,25x^2-1=16 equation:

0.25x^2-1=16

We move all terms to the left:

0.25x^2-1-(16)=0

We add all the numbers together, and all the variables

0.25x^2-17=0

a = 0.25; b = 0; c = -17;
Δ = b2-4ac
Δ = 02-4·0.25·(-17)
Δ = 17
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{17}}{2*0.25}=\frac{0-\sqrt{17}}{0.5}
=-\frac{\sqrt{}}{0.5}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+\sqrt{17}}{2*0.25}=\frac{0+\sqrt{17}}{0.5}
=\frac{\sqrt{}}{0.5}
$