Question

Helllp la toate cele 3 exercitii!
Multumesc mult

Answer 1

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Answer 2

$4)x = {p}^{2} + p \\ \\ y = p - 1 \\ \\ z = {p}^{2} - 1 \\ \\ \frac{x \times y}{z} = \frac{( {p}^{2} + p)(p - 1) }{ {p}^{2} - 1 } = \frac{p(p + 1)(p - 1)}{ {p}^{2} - 1 } = \frac{p( {p}^{2} - 1) }{ {p}^{2} - 1 } = p \\ \\ 5) \frac{7 + \sqrt{1} }{x} = \frac{2}{7 - \sqrt{1} } \\ \\ \frac{7 + 1}{x} = \frac{2}{7 - 1} \\ \\ \frac{8}{x} = \frac{2}{7 - 1} \\ \\ \frac{8}{x} = \frac{2}{6} \\ \\ \frac{8}{x} = \frac{1}{3} \\ \\ 8 = \frac{1}{3}x \\ \\ 8 = \frac{x}{3} \\ \\ 8 \times 3 = x \\ \\ 24 = x \\ \\ x = 24 \\ \\ 6)a = \sqrt{ {3}^{4} + {3}^{5} } = \sqrt{81 + 243} = \sqrt{324} = 18$