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3x^2-49x+130=0
a = 3; b = -49; c = +130;
Δ = b2-4ac
Δ = -492-4·3·130
Δ = 841
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{841}=29$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-49)-29}{2*3}=\frac{20}{6} =3+1/3 $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-49)+29}{2*3}=\frac{78}{6} =13 $
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