4x2+40x+36=0

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Solution for 4x2+40x+36=0 equation:



4x^2+40x+36=0
a = 4; b = 40; c = +36;
Δ = b2-4ac
Δ = 402-4·4·36
Δ = 1024
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{1024}=32$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(40)-32}{2*4}=\frac{-72}{8} =-9 $
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(40)+32}{2*4}=\frac{-8}{8} =-1 $

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