Question

Me ayudann
por favor lo necesito para mañana!​

Answer 1

Respuesta:

${x}^{2} - 7 = 29 \\ {x}^{2} = 29 + 7 \\ x = \sqrt[2]{36} \\ x = 6$

${x}^{2} - 8 = - 8 \\ {x}^{2} = - 8 + 8 \\ {x}^{2} = 0 \\ x = \sqrt[2]{0} \\ x = 0$

${(x + 7)}^{2} - 21 = 28 \\ {x}^{2} + 14x + 49 - 21 = 28 \\ {x}^{2} + 14x + 28 \\ {x}^{2} + 14x + 28 - 28 = 0 \\ {x}^{2} + 14x = 0 \\ x(x + 14) = 0 \\ x = 0 \\ x + 14 = 0 \\ x = - 14$

${x}^{2} + x - 2 = 0 \\ ( x+ 2)(x - 1)$

${x}^{2} + 7 = 3 \\ {x}^{2} = 3 - 7 \\ {x}^{2} = - 4 \\ x = \sqrt[2]{ - 4} \\ x = 2i \\ \\ \sqrt{ - 1} = i \\ \sqrt{ - 4} = \sqrt{ 4} \times \sqrt{ - 1} = 2i$

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