(3x-1)(2x+9)=0

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Solution for (3x-1)(2x+9)=0 equation:



(3x-1)(2x+9)=0
We multiply parentheses ..
(+6x^2+27x-2x-9)=0
We get rid of parentheses
6x^2+27x-2x-9=0
We add all the numbers together, and all the variables
6x^2+25x-9=0
a = 6; b = 25; c = -9;
Δ = b2-4ac
Δ = 252-4·6·(-9)
Δ = 841
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{841}=29$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(25)-29}{2*6}=\frac{-54}{12} =-4+1/2 $
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(25)+29}{2*6}=\frac{4}{12} =1/3 $

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