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2/3x-2/7-5/6x=12
We move all terms to the left:
2/3x-2/7-5/6x-(12)=0
Domain of the equation: 3x!=0
x!=0/3
x!=0
x∈R
Domain of the equation: 6x!=0determiningTheFunctionDomain 2/3x-5/6x-12-2/7=0
x!=0/6
x!=0
x∈R
We calculate fractions
(-216x^2)/882x^2+588x/882x^2+(-735x)/882x^2-12=0
We multiply all the terms by the denominator
(-216x^2)+588x+(-735x)-12*882x^2=0
Wy multiply elements
(-216x^2)-10584x^2+588x+(-735x)=0
We get rid of parentheses
-216x^2-10584x^2+588x-735x=0
We add all the numbers together, and all the variables
-10800x^2-147x=0
a = -10800; b = -147; c = 0;
Δ = b2-4ac
Δ = -1472-4·(-10800)·0
Δ = 21609
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$\sqrt{\Delta}=\sqrt{21609}=147$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-147)-147}{2*-10800}=\frac{0}{-21600} =0 $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-147)+147}{2*-10800}=\frac{294}{-21600} =-49/3600 $
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