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121/4x+6=5x-51
We move all terms to the left:
121/4x+6-(5x-51)=0
Domain of the equation: 4x!=0We get rid of parentheses
x!=0/4
x!=0
x∈R
121/4x-5x+51+6=0
We multiply all the terms by the denominator
-5x*4x+51*4x+6*4x+121=0
Wy multiply elements
-20x^2+204x+24x+121=0
We add all the numbers together, and all the variables
-20x^2+228x+121=0
a = -20; b = 228; c = +121;
Δ = b2-4ac
Δ = 2282-4·(-20)·121
Δ = 61664
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$
The end solution:
$\sqrt{\Delta}=\sqrt{61664}=\sqrt{16*3854}=\sqrt{16}*\sqrt{3854}=4\sqrt{3854}$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(228)-4\sqrt{3854}}{2*-20}=\frac{-228-4\sqrt{3854}}{-40} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(228)+4\sqrt{3854}}{2*-20}=\frac{-228+4\sqrt{3854}}{-40} $
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