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3x(4x-4)=-1
We move all terms to the left:
3x(4x-4)-(-1)=0
We add all the numbers together, and all the variables
3x(4x-4)+1=0
We multiply parentheses
12x^2-12x+1=0
a = 12; b = -12; c = +1;
Δ = b2-4ac
Δ = -122-4·12·1
Δ = 96
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$
The end solution:
$\sqrt{\Delta}=\sqrt{96}=\sqrt{16*6}=\sqrt{16}*\sqrt{6}=4\sqrt{6}$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-12)-4\sqrt{6}}{2*12}=\frac{12-4\sqrt{6}}{24} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-12)+4\sqrt{6}}{2*12}=\frac{12+4\sqrt{6}}{24} $
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