4x^2-16+x=0

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Solution for 4x^2-16+x=0 equation: 



4x^2-16+x=0

a = 4; b = 1; c = -16;
Δ = b2-4ac
Δ = 12-4·4·(-16)
Δ = 257
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{-(1)-\sqrt{257}}{2*4}=\frac{-1-\sqrt{257}}{8}
$


$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(1)+\sqrt{257}}{2*4}=\frac{-1+\sqrt{257}}{8}
$

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