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0.5x^2-3x-0.5x=0
We add all the numbers together, and all the variables
0.5x^2-3.5x=0
a = 0.5; b = -3.5; c = 0;
Δ = b2-4ac
Δ = -3.52-4·0.5·0
Δ = 12.25
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{-(-3.5)-\sqrt{12.25}}{2*0.5}=\frac{3.5-\sqrt{12.25}}{1} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-3.5)+\sqrt{12.25}}{2*0.5}=\frac{3.5+\sqrt{12.25}}{1} $
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