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1/4y^2+20=36
We move all terms to the left:
1/4y^2+20-(36)=0
Domain of the equation: 4y^2!=0We add all the numbers together, and all the variables
y^2!=0/4
y^2!=√0
y!=0
y∈R
1/4y^2-16=0
We multiply all the terms by the denominator
-16*4y^2+1=0
Wy multiply elements
-64y^2+1=0
a = -64; b = 0; c = +1;
Δ = b2-4ac
Δ = 02-4·(-64)·1
Δ = 256
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}$$y_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$\sqrt{\Delta}=\sqrt{256}=16$$y_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-16}{2*-64}=\frac{-16}{-128} =1/8 $$y_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+16}{2*-64}=\frac{16}{-128} =-1/8 $
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