Select the equivalent expression. \[ \begin{array}{ll}\frac{x^{-6} \cdot x^{7}}{x^{-8}} \\ x^{9} & \frac{1}{x^{21}} \\ x^{21} & \frac{1}{x^{9}}\end{array} \] Answer \[ \]

Find the value of \( m \) if \( \alpha+\beta=-2 \). (b) Seterusnya, bentukkan persamaan kuadratik dengan punca-punca \( \alpha \) dan \( \beta \). Hence, form a quadratic equation with roots \( \alpha \) and \( \beta \).

What is the solution to the equation? \( \sqrt[3]{2 x+5}=5 \) A. 240 B. 65 ( \( ) 60 \) D. 6 D. 5

Enter the correct answer in the box. Rewrite the expression \( 2 \sqrt[4]{x^{7}} \) using rational exponents. \( \begin{array}{lll}\frac{\square}{\square} & \text { (ㅁ) } \mid \text { 미 } \square^{\square} \mid+--\end{array} \)

Encuentra el resultado utilizando la propiedad de potencias: \( (a^{2b})^{3} \)

1. Найдите т \( y=x^{3}-48 x+14 \)