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2/a+2+1/a+1+4/2a-5=0
Domain of the equation: a!=0
a∈R
Domain of the equation: 2a!=0We add all the numbers together, and all the variables
a!=0/2
a!=0
a∈R
2/a+1/a+4/2a-2=0
We calculate fractions
(2a+2)/2a^2+4a/2a^2-2=0
We multiply all the terms by the denominator
(2a+2)+4a-2*2a^2=0
We add all the numbers together, and all the variables
4a+(2a+2)-2*2a^2=0
Wy multiply elements
-4a^2+4a+(2a+2)=0
We get rid of parentheses
-4a^2+4a+2a+2=0
We add all the numbers together, and all the variables
-4a^2+6a+2=0
a = -4; b = 6; c = +2;
Δ = b2-4ac
Δ = 62-4·(-4)·2
Δ = 68
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:$a_{1}=\frac{-b-\sqrt{\Delta}}{2a}$$a_{2}=\frac{-b+\sqrt{\Delta}}{2a}$
The end solution:
$\sqrt{\Delta}=\sqrt{68}=\sqrt{4*17}=\sqrt{4}*\sqrt{17}=2\sqrt{17}$$a_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(6)-2\sqrt{17}}{2*-4}=\frac{-6-2\sqrt{17}}{-8} $$a_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(6)+2\sqrt{17}}{2*-4}=\frac{-6+2\sqrt{17}}{-8} $
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