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12x^2-4x=22
We move all terms to the left:
12x^2-4x-(22)=0
a = 12; b = -4; c = -22;
Δ = b2-4ac
Δ = -42-4·12·(-22)
Δ = 1072
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$
The end solution:
$\sqrt{\Delta}=\sqrt{1072}=\sqrt{16*67}=\sqrt{16}*\sqrt{67}=4\sqrt{67}$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-4)-4\sqrt{67}}{2*12}=\frac{4-4\sqrt{67}}{24} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-4)+4\sqrt{67}}{2*12}=\frac{4+4\sqrt{67}}{24} $
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