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2(x+3)=4x(x-1)
We move all terms to the left:
2(x+3)-(4x(x-1))=0
We multiply parentheses
2x-(4x(x-1))+6=0
We calculate terms in parentheses: -(4x(x-1)), so:We get rid of parentheses
4x(x-1)
We multiply parentheses
4x^2-4x
Back to the equation:
-(4x^2-4x)
-4x^2+2x+4x+6=0
We add all the numbers together, and all the variables
-4x^2+6x+6=0
a = -4; b = 6; c = +6;
Δ = b2-4ac
Δ = 62-4·(-4)·6
Δ = 132
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$
The end solution:
$\sqrt{\Delta}=\sqrt{132}=\sqrt{4*33}=\sqrt{4}*\sqrt{33}=2\sqrt{33}$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(6)-2\sqrt{33}}{2*-4}=\frac{-6-2\sqrt{33}}{-8} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(6)+2\sqrt{33}}{2*-4}=\frac{-6+2\sqrt{33}}{-8} $
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