3x2+28x+64=0

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Solution for 3x2+28x+64=0 equation:



3x^2+28x+64=0
a = 3; b = 28; c = +64;
Δ = b2-4ac
Δ = 282-4·3·64
Δ = 16
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{16}=4$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(28)-4}{2*3}=\frac{-32}{6} =-5+1/3 $
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(28)+4}{2*3}=\frac{-24}{6} =-4 $

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