5(3x-3)(x-1)=0

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Solution for 5(3x-3)(x-1)=0 equation: 



5(3x-3)(x-1)=0

We multiply parentheses ..

5(+3x^2-3x-3x+3)=0

We multiply parentheses

15x^2-15x-15x+15=0

We add all the numbers together, and all the variables

15x^2-30x+15=0

a = 15; b = -30; c = +15;
Δ = b2-4ac
Δ = -302-4·15·15
Δ = 0
Delta is equal to zero, so there is only one solution to the equation

                              Stosujemy wzór:
$x=\frac{-b}{2a}=\frac{30}{30}=1$

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