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(2y-3)(2y-1)=5y
We move all terms to the left:
(2y-3)(2y-1)-(5y)=0
We add all the numbers together, and all the variables
-5y+(2y-3)(2y-1)=0
We multiply parentheses ..
(+4y^2-2y-6y+3)-5y=0
We get rid of parentheses
4y^2-2y-6y-5y+3=0
We add all the numbers together, and all the variables
4y^2-13y+3=0
a = 4; b = -13; c = +3;
Δ = b2-4ac
Δ = -132-4·4·3
Δ = 121
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{121}=11$$y_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-13)-11}{2*4}=\frac{2}{8} =1/4 $$y_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-13)+11}{2*4}=\frac{24}{8} =3 $
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