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x^2-1.44x+0.45=0
a = 1; b = -1.44; c = +0.45;
Δ = b2-4ac
Δ = -1.442-4·1·0.45
Δ = 0.2736
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{-(-1.44)-\sqrt{0.2736}}{2*1}=\frac{1.44-\sqrt{0.2736}}{2} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-1.44)+\sqrt{0.2736}}{2*1}=\frac{1.44+\sqrt{0.2736}}{2} $
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