Question

Help La toate exercitiile. Multumesc Tare mult! :)

Answer 1

$1) \\ \\ ( - \frac{ {x}^{2} }{ {y}^{4} }) : ( - \frac{ {x}^{4} }{ {y}^{2} }) = \frac{ {x}^{2} }{ {y}^{4} } \times \frac{ {y}^{2} }{ {x}^{4} } = \frac{ {x}^{2} {y}^{2} }{ {y}^{4} {x}^{4} } = {x}^{2 - 4} {y}^{2 - 4} = {x}^{ - 2} {y}^{ - 2} = \frac{1}{ {x}^{2} } {y}^{ - 2} = \frac{1}{ {x}^{2} } \times \frac{1}{ {y}^{2} } = \frac{1}{ {x}^{2} {y}^{2} } \\ \\ 2) \\ \\ \frac{x - 1}{4} = \frac{3}{2} \\ \\ x - 1 = \frac{3}{2} \times 4 = \frac{12}{2} = 6 \\ \\ x = 6 + 1 = 7$

Answer 2

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