4x(x+6)=38

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Solution for 4x(x+6)=38 equation:



4x(x+6)=38
We move all terms to the left:
4x(x+6)-(38)=0
We multiply parentheses
4x^2+24x-38=0
a = 4; b = 24; c = -38;
Δ = b2-4ac
Δ = 242-4·4·(-38)
Δ = 1184
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

The end solution:
$\sqrt{\Delta}=\sqrt{1184}=\sqrt{16*74}=\sqrt{16}*\sqrt{74}=4\sqrt{74}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(24)-4\sqrt{74}}{2*4}=\frac{-24-4\sqrt{74}}{8} $
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(24)+4\sqrt{74}}{2*4}=\frac{-24+4\sqrt{74}}{8} $

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