(3.5-1.5y)(3.5-1.5y)=0

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Solution for (3.5-1.5y)(3.5-1.5y)=0 equation: 



(3.5-1.5y)(3.5-1.5y)=0

We add all the numbers together, and all the variables

(-1.5y+3.5)(-1.5y+3.5)=0

We multiply parentheses ..

(+y^2-3.5y-3.5y+12.25)=0

We get rid of parentheses

y^2-3.5y-3.5y+12.25=0

We add all the numbers together, and all the variables

y^2-7y+12.25=0

a = 1; b = -7; c = +12.25;
Δ = b2-4ac
Δ = -72-4·1·12.25
Δ = 0
Delta is equal to zero, so there is only one solution to the equation

                              Stosujemy wzór:
$y=\frac{-b}{2a}=\frac{7}{2}=3+1/2$

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