-3x(x-6)=x+2-4x

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Solution for -3x(x-6)=x+2-4x equation:



-3x(x-6)=x+2-4x
We move all terms to the left:
-3x(x-6)-(x+2-4x)=0
We add all the numbers together, and all the variables
-3x(x-6)-(-3x+2)=0
We multiply parentheses
-3x^2+18x-(-3x+2)=0
We get rid of parentheses
-3x^2+18x+3x-2=0
We add all the numbers together, and all the variables
-3x^2+21x-2=0
a = -3; b = 21; c = -2;
Δ = b2-4ac
Δ = 212-4·(-3)·(-2)
Δ = 417
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{-(21)-\sqrt{417}}{2*-3}=\frac{-21-\sqrt{417}}{-6} $
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(21)+\sqrt{417}}{2*-3}=\frac{-21+\sqrt{417}}{-6} $

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