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0.5x^2-3x-4=0
a = 0.5; b = -3; c = -4;
Δ = b2-4ac
Δ = -32-4·0.5·(-4)
Δ = 17
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{-(-3)-\sqrt{17}}{2*0.5}=\frac{3-\sqrt{17}}{1} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-3)+\sqrt{17}}{2*0.5}=\frac{3+\sqrt{17}}{1} $
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