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(3/10)y+y=36
We move all terms to the left:
(3/10)y+y-(36)=0
Domain of the equation: 10)y!=0We add all the numbers together, and all the variables
y!=0/1
y!=0
y∈R
(+3/10)y+y-36=0
We add all the numbers together, and all the variables
y+(+3/10)y-36=0
We multiply parentheses
3y^2+y-36=0
a = 3; b = 1; c = -36;
Δ = b2-4ac
Δ = 12-4·3·(-36)
Δ = 433
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}$$y_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$y_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(1)-\sqrt{433}}{2*3}=\frac{-1-\sqrt{433}}{6} $$y_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(1)+\sqrt{433}}{2*3}=\frac{-1+\sqrt{433}}{6} $
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