a*7a=0

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Solution for a*7a=0 equation: 



a*7a=0

Wy multiply elements

7a^2=0

a = 7; b = 0; c = 0;
Δ = b2-4ac
Δ = 02-4·7·0
Δ = 0
Delta is equal to zero, so there is only one solution to the equation

                              Stosujemy wzór:
$a=\frac{-b}{2a}=\frac{0}{14}=0$

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