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-0.5x^2+5x-12=0
a = -0.5; b = 5; c = -12;
Δ = b2-4ac
Δ = 52-4·(-0.5)·(-12)
Δ = 1
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{1}=1$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(5)-1}{2*-0.5}=\frac{-6}{-1} =+6 $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(5)+1}{2*-0.5}=\frac{-4}{-1} =+4 $
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