4x2+x-1/4=0

Solution for 4x2+x-1/4=0 equation:

4x^2+x-1/4=0

We multiply all the terms by the denominator


4x^2*4+x*4-1=0

Wy multiply elements

16x^2+4x-1=0

a = 16; b = 4; c = -1;
Δ = b2-4ac
Δ = 42-4·16·(-1)
Δ = 80
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:

$\sqrt{\Delta}=\sqrt{80}=\sqrt{16*5}=\sqrt{16}*\sqrt{5}=4\sqrt{5}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(4)-4\sqrt{5}}{2*16}=\frac{-4-4\sqrt{5}}{32}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(4)+4\sqrt{5}}{2*16}=\frac{-4+4\sqrt{5}}{32}
$