5y2+11y+2=0

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Solution for 5y2+11y+2=0 equation: 



5y^2+11y+2=0

a = 5; b = 11; c = +2;
Δ = b2-4ac
Δ = 112-4·5·2
Δ = 81
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$y_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$y_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{81}=9$


$y_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(11)-9}{2*5}=\frac{-20}{10}
=-2
$


$y_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(11)+9}{2*5}=\frac{-2}{10}
=-1/5
$

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