Question

Помогите пожалуйста срочно

Answer 1

$\tt \cfrac{a^2-2b}{a}-a= \cfrac{a^2-2b-a^2}{a}=\cfrac{-2b}{a}=\cfrac{-2\cdot5}{0.2}=\cfrac{-10}{0.2}=-50$

Answer 2

$\frac{ {a}^{2} - 2b }{a} - a$
при а = 0,2 ; b = 5 :
$\frac{ {a}^{2} - 2b }{a} - a = \frac{ {0.2}^{2} - 2 \times 5}{0.2} - 0.2 = \frac{0.04 - 10}{0.2} - 0.2 = - \frac{9.96}{0.2} - 0.2 = - \frac{249}{5} - 0.2 = - \frac{249}{5} - \frac{1}{5} = - \frac{250}{5} = - \frac{250 \div 5}{5 \div 5} = - \frac{50}{1} = - 50$