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\frac{-8+8i\sqrt{2}}{-4}
Aïlleu la -128=\left(8i\right)^{2}\times 2. Torna a escriure l'arrel quadrada del producte \sqrt{\left(8i\right)^{2}\times 2} com a producte d'arrel quadrada \sqrt{\left(8i\right)^{2}}\sqrt{2}. Calculeu l'arrel quadrada de \left(8i\right)^{2}.
\frac{8-8i\sqrt{2}}{4}
Multipliqueu tant el numerador com el denominador per -1.