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x^2-0.84448x-8.2863=0
a = 1; b = -0.84448; c = -8.2863;
Δ = b2-4ac
Δ = -0.844482-4·1·(-8.2863)
Δ = 33.8583464704
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{-(-0.84448)-\sqrt{33.8583464704}}{2*1}=\frac{0.84448-\sqrt{33.8583464704}}{2} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-0.84448)+\sqrt{33.8583464704}}{2*1}=\frac{0.84448+\sqrt{33.8583464704}}{2} $
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