Question

me ajudem plissss
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Answer 1

$\frac{-\left(-8\right)+\sqrt{\left(-8\right)^2-4\cdot \:4\cdot \:4}}{2\cdot \:4}\\\\\mathrm{Aplique\:a\:regra}:\quad \:-\left(-a\right)=a\\\\-\left(-8\right)=8\\\\=\frac{8+\sqrt{\left(-8\right)^2-4\cdot \:4\cdot \:4}}{2\cdot \:4}\\\\=\frac{8}{2\cdot \:4}\\\\\mathrm{Fatorar\:o\:numero:\:}\:8=2\cdot \:4\\\\=\frac{2\cdot \:4}{2\cdot \:4}\\\\\mathrm{Eliminar\:o\:fator\:comum:}\:2\\\\=\frac{4}{4}\\\\\mathrm{Aplicar\:as\:propriedades\:das\:fracoes}:\quad \frac{a}{a}=1\\\\=1$