Question

$\frac{ {x}^{2 } - 2x - 7}{ {x}^{2} - 9} + \frac{ 3x + 1}{ {x}^{2} - 9}$

$\frac{8x + 8y}{x2} \div \frac{ {x}^{2 - {y}^{2} } }{8x}$
$\frac{t - 1}{t - 2} - \frac{ {t}^{2} + 4t - 4}{ {t}^{2} + 4t - 12 }$
thanks Po in advance ☺️​

Answer 1

Answer:

sorry but I don't know it's answer