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2/3y+(-8)=-12.5y+150
We move all terms to the left:
2/3y+(-8)-(-12.5y+150)=0
Domain of the equation: 3y!=0We add all the numbers together, and all the variables
y!=0/3
y!=0
y∈R
2/3y-(-12.5y+150)-8=0
We get rid of parentheses
2/3y+12.5y-150-8=0
We multiply all the terms by the denominator
(12.5y)*3y-150*3y-8*3y+2=0
We add all the numbers together, and all the variables
(+12.5y)*3y-150*3y-8*3y+2=0
We multiply parentheses
36y^2-150*3y-8*3y+2=0
Wy multiply elements
36y^2-450y-24y+2=0
We add all the numbers together, and all the variables
36y^2-474y+2=0
a = 36; b = -474; c = +2;
Δ = b2-4ac
Δ = -4742-4·36·2
Δ = 224388
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}$$y_{2}=\frac{-b+\sqrt{\Delta}}{2a}$
The end solution:
$\sqrt{\Delta}=\sqrt{224388}=\sqrt{36*6233}=\sqrt{36}*\sqrt{6233}=6\sqrt{6233}$$y_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-474)-6\sqrt{6233}}{2*36}=\frac{474-6\sqrt{6233}}{72} $$y_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-474)+6\sqrt{6233}}{2*36}=\frac{474+6\sqrt{6233}}{72} $
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