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(3i)(-5i)=0
We multiply parentheses
-15i^2=0
a = -15; b = 0; c = 0;
Δ = b2-4ac
Δ = 02-4·(-15)·0
Δ = 0
Delta is equal to zero, so there is only one solution to the equation
Stosujemy wzór:$i=\frac{-b}{2a}=\frac{0}{-30}=0$
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