3x(x-2)+5=2x

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Solution for 3x(x-2)+5=2x equation:



3x(x-2)+5=2x
We move all terms to the left:
3x(x-2)+5-(2x)=0
We add all the numbers together, and all the variables
-2x+3x(x-2)+5=0
We multiply parentheses
3x^2-2x-6x+5=0
We add all the numbers together, and all the variables
3x^2-8x+5=0
a = 3; b = -8; c = +5;
Δ = b2-4ac
Δ = -82-4·3·5
Δ = 4
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{4}=2$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-8)-2}{2*3}=\frac{6}{6} =1 $
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-8)+2}{2*3}=\frac{10}{6} =1+2/3 $

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