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0.11=(x+0.5)x
We move all terms to the left:
0.11-((x+0.5)x)=0
We calculate terms in parentheses: -((x+0.5)x), so:We get rid of parentheses
(x+0.5)x
We multiply parentheses
x^2+0.5x
Back to the equation:
-(x^2+0.5x)
-x^2-0.5x+0.11=0
We add all the numbers together, and all the variables
-1x^2-0.5x+0.11=0
a = -1; b = -0.5; c = +0.11;
Δ = b2-4ac
Δ = -0.52-4·(-1)·0.11
Δ = 0.69
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{-(-0.5)-\sqrt{0.69}}{2*-1}=\frac{0.5-\sqrt{0.69}}{-2} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-0.5)+\sqrt{0.69}}{2*-1}=\frac{0.5+\sqrt{0.69}}{-2} $
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