2x+x(3x+5)=74

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Solution for 2x+x(3x+5)=74 equation:



2x+x(3x+5)=74
We move all terms to the left:
2x+x(3x+5)-(74)=0
We multiply parentheses
3x^2+2x+5x-74=0
We add all the numbers together, and all the variables
3x^2+7x-74=0
a = 3; b = 7; c = -74;
Δ = b2-4ac
Δ = 72-4·3·(-74)
Δ = 937
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(7)-\sqrt{937}}{2*3}=\frac{-7-\sqrt{937}}{6} $
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(7)+\sqrt{937}}{2*3}=\frac{-7+\sqrt{937}}{6} $

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