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x(-1.7x+10.3)=0
We multiply parentheses
-1x^2+10.3x=0
a = -1; b = 10.3; c = 0;
Δ = b2-4ac
Δ = 10.32-4·(-1)·0
Δ = 106.09
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{-(10.3)-\sqrt{106.09}}{2*-1}=\frac{-10.3-\sqrt{106.09}}{-2} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(10.3)+\sqrt{106.09}}{2*-1}=\frac{-10.3+\sqrt{106.09}}{-2} $
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