36x^2-7x-4=0

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Solution for 36x^2-7x-4=0 equation:



36x^2-7x-4=0
a = 36; b = -7; c = -4;
Δ = b2-4ac
Δ = -72-4·36·(-4)
Δ = 625
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{625}=25$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-7)-25}{2*36}=\frac{-18}{72} =-1/4 $
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-7)+25}{2*36}=\frac{32}{72} =4/9 $

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