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1.73=x2+2x
We move all terms to the left:
1.73-(x2+2x)=0
We add all the numbers together, and all the variables
-(+x^2+2x)+1.73=0
We get rid of parentheses
-x^2-2x+1.73=0
We add all the numbers together, and all the variables
-1x^2-2x+1.73=0
a = -1; b = -2; c = +1.73;
Δ = b2-4ac
Δ = -22-4·(-1)·1.73
Δ = 10.92
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{-(-2)-\sqrt{10.92}}{2*-1}=\frac{2-\sqrt{10.92}}{-2} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-2)+\sqrt{10.92}}{2*-1}=\frac{2+\sqrt{10.92}}{-2} $
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