2x2+20x+34=0

Solution for 2x2+20x+34=0 equation:

2x^2+20x+34=0

a = 2; b = 20; c = +34;
Δ = b2-4ac
Δ = 202-4·2·34
Δ = 128
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:

$\sqrt{\Delta}=\sqrt{128}=\sqrt{64*2}=\sqrt{64}*\sqrt{2}=8\sqrt{2}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(20)-8\sqrt{2}}{2*2}=\frac{-20-8\sqrt{2}}{4}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(20)+8\sqrt{2}}{2*2}=\frac{-20+8\sqrt{2}}{4}
$