Respuesta :
[tex]\bf i=\sqrt{-1}\qquad \qquad i^2=\sqrt{-1}\cdot \sqrt{-1}\implies \sqrt{(-1)^2}\implies -1\\\\
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(-55i)^2\implies (-55)^2(i)^2\implies 3025\cdot i^2\implies 3025\cdot -1\implies -3025[/tex]