6x2-25x+21=0

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Solution for 6x2-25x+21=0 equation:



6x^2-25x+21=0
a = 6; b = -25; c = +21;
Δ = b2-4ac
Δ = -252-4·6·21
Δ = 121
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{121}=11$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-25)-11}{2*6}=\frac{14}{12} =1+1/6 $
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-25)+11}{2*6}=\frac{36}{12} =3 $

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