15a^2+3a=0

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Solution for 15a^2+3a=0 equation: 



15a^2+3a=0

a = 15; b = 3; c = 0;
Δ = b2-4ac
Δ = 32-4·15·0
Δ = 9
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$a_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$a_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{9}=3$


$a_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(3)-3}{2*15}=\frac{-6}{30}
=-1/5
$


$a_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(3)+3}{2*15}=\frac{0}{30}
=0
$

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