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6x(x-2)=-2-5x
We move all terms to the left:
6x(x-2)-(-2-5x)=0
We add all the numbers together, and all the variables
6x(x-2)-(-5x-2)=0
We multiply parentheses
6x^2-12x-(-5x-2)=0
We get rid of parentheses
6x^2-12x+5x+2=0
We add all the numbers together, and all the variables
6x^2-7x+2=0
a = 6; b = -7; c = +2;
Δ = b2-4ac
Δ = -72-4·6·2
Δ = 1
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$\sqrt{\Delta}=\sqrt{1}=1$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-7)-1}{2*6}=\frac{6}{12} =1/2 $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-7)+1}{2*6}=\frac{8}{12} =2/3 $
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