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2n-11=3/2n-8
We move all terms to the left:
2n-11-(3/2n-8)=0
Domain of the equation: 2n-8)!=0We get rid of parentheses
n∈R
2n-3/2n+8-11=0
We multiply all the terms by the denominator
2n*2n+8*2n-11*2n-3=0
Wy multiply elements
4n^2+16n-22n-3=0
We add all the numbers together, and all the variables
4n^2-6n-3=0
a = 4; b = -6; c = -3;
Δ = b2-4ac
Δ = -62-4·4·(-3)
Δ = 84
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:$n_{1}=\frac{-b-\sqrt{\Delta}}{2a}$$n_{2}=\frac{-b+\sqrt{\Delta}}{2a}$
The end solution:
$\sqrt{\Delta}=\sqrt{84}=\sqrt{4*21}=\sqrt{4}*\sqrt{21}=2\sqrt{21}$$n_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-6)-2\sqrt{21}}{2*4}=\frac{6-2\sqrt{21}}{8} $$n_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-6)+2\sqrt{21}}{2*4}=\frac{6+2\sqrt{21}}{8} $
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