Question

СРОЧНО!!! Знайдіть значення виразу ​

Answer 1

$\displaystyle\bf\\\Big(m^{2} -10mn+25n^{2} \Big):\frac{0,2m^{2}-5n^{2} }{5} =\\\\\\=\Big(m-5n\Big)^{2} :\frac{0,2\cdot(m^{2} -25n^{2} )}{5} =\\\\\\=\Big(m-5n\Big)^{2} :\frac{0,2\cdot(m -5n)(m+5n)}{5} =\\\\\\=\frac{(m-5n)^{2} \cdot 5}{0,2\cdot(m-5n)\cdot(m+5n)}=\frac{25\cdot(m-5n)}{m+5n} \\\\\\m=10 \ \ \ ; \ \ \ n=3\\\\\\\frac{25\cdot(m-5n)}{m+5n} =\frac{25\cdot(10-5\cdot 3)}{10+5\cdot 3} =\frac{25\cdot (-5)}{25}=-5\\\\\\Otvet \ : \ -5$