Question

Срочнооооооооо задания 12 пж

Answer 1

$\frac{ a^{2}-25 }{5 a^{2}+25a }= \frac{(a-5)(a+5)}{5a(a+5)}= \frac{a-5}{5a} \\ \\ \\ a=0,8 \\ \\ \\ \frac{0.8-5}{5*0.8} = \frac{-4,2}{4}=-1,05$

Answer 2

​5a​2​​+25a​​a​2​​−25​​=​5a(a+5)​​(a−5)(a+5)​​=​5a​​a−5​​​​​a=0,8​​​​5∗0.8​​0.8−5​​=​4​​−4,2​​=−1,05​​