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5+8n=50+1/2n
We move all terms to the left:
5+8n-(50+1/2n)=0
Domain of the equation: 2n)!=0We add all the numbers together, and all the variables
n!=0/1
n!=0
n∈R
8n-(1/2n+50)+5=0
We get rid of parentheses
8n-1/2n-50+5=0
We multiply all the terms by the denominator
8n*2n-50*2n+5*2n-1=0
Wy multiply elements
16n^2-100n+10n-1=0
We add all the numbers together, and all the variables
16n^2-90n-1=0
a = 16; b = -90; c = -1;
Δ = b2-4ac
Δ = -902-4·16·(-1)
Δ = 8164
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}$$n_{2}=\frac{-b+\sqrt{\Delta}}{2a}$
The end solution:
$\sqrt{\Delta}=\sqrt{8164}=\sqrt{4*2041}=\sqrt{4}*\sqrt{2041}=2\sqrt{2041}$$n_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-90)-2\sqrt{2041}}{2*16}=\frac{90-2\sqrt{2041}}{32} $$n_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-90)+2\sqrt{2041}}{2*16}=\frac{90+2\sqrt{2041}}{32} $
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