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1/4y+y+5/4y=50
We move all terms to the left:
1/4y+y+5/4y-(50)=0
Domain of the equation: 4y!=0We add all the numbers together, and all the variables
y!=0/4
y!=0
y∈R
y+1/4y+5/4y-50=0
We multiply all the terms by the denominator
y*4y-50*4y+1+5=0
We add all the numbers together, and all the variables
y*4y-50*4y+6=0
Wy multiply elements
4y^2-200y+6=0
a = 4; b = -200; c = +6;
Δ = b2-4ac
Δ = -2002-4·4·6
Δ = 39904
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:$y_{1}=\frac{-b-\sqrt{\Delta}}{2a}$$y_{2}=\frac{-b+\sqrt{\Delta}}{2a}$
The end solution:
$\sqrt{\Delta}=\sqrt{39904}=\sqrt{16*2494}=\sqrt{16}*\sqrt{2494}=4\sqrt{2494}$$y_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-200)-4\sqrt{2494}}{2*4}=\frac{200-4\sqrt{2494}}{8} $$y_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-200)+4\sqrt{2494}}{2*4}=\frac{200+4\sqrt{2494}}{8} $
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