(3x+1)*(x+6)=0

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Solution for (3x+1)*(x+6)=0 equation:



(3x+1)(x+6)=0
We multiply parentheses ..
(+3x^2+18x+x+6)=0
We get rid of parentheses
3x^2+18x+x+6=0
We add all the numbers together, and all the variables
3x^2+19x+6=0
a = 3; b = 19; c = +6;
Δ = b2-4ac
Δ = 192-4·3·6
Δ = 289
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{289}=17$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(19)-17}{2*3}=\frac{-36}{6} =-6 $
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(19)+17}{2*3}=\frac{-2}{6} =-1/3 $

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