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8x(-3x-2)=4(3x-1)
We move all terms to the left:
8x(-3x-2)-(4(3x-1))=0
We multiply parentheses
-24x^2-16x-(4(3x-1))=0
We calculate terms in parentheses: -(4(3x-1)), so:We get rid of parentheses
4(3x-1)
We multiply parentheses
12x-4
Back to the equation:
-(12x-4)
-24x^2-16x-12x+4=0
We add all the numbers together, and all the variables
-24x^2-28x+4=0
a = -24; b = -28; c = +4;
Δ = b2-4ac
Δ = -282-4·(-24)·4
Δ = 1168
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$
The end solution:
$\sqrt{\Delta}=\sqrt{1168}=\sqrt{16*73}=\sqrt{16}*\sqrt{73}=4\sqrt{73}$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-28)-4\sqrt{73}}{2*-24}=\frac{28-4\sqrt{73}}{-48} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-28)+4\sqrt{73}}{2*-24}=\frac{28+4\sqrt{73}}{-48} $
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