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2x^2-5x-104=0
a = 2; b = -5; c = -104;
Δ = b2-4ac
Δ = -52-4·2·(-104)
Δ = 857
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-5)-\sqrt{857}}{2*2}=\frac{5-\sqrt{857}}{4} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-5)+\sqrt{857}}{2*2}=\frac{5+\sqrt{857}}{4} $
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