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8.5x+4.4x^2=0
a = 4.4; b = 8.5; c = 0;
Δ = b2-4ac
Δ = 8.52-4·4.4·0
Δ = 72.25
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{-(8.5)-\sqrt{72.25}}{2*4.4}=\frac{-8.5-\sqrt{72.25}}{8.8} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(8.5)+\sqrt{72.25}}{2*4.4}=\frac{-8.5+\sqrt{72.25}}{8.8} $
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