Question

40 БАЛЛОВ ПРОШУ!!!!!!

Answer 1

$\frac{m^{6} n^{7} + m^{4} n^{9} }{m^{4} n^{7} } = \frac{m^{4} n^{7}(m^{2} +n^{2}) }{m^{4} n^{7} } = m^{2} + n^{2} = (m-n)(m+n)$

$(-0,9-(-0,1))(-0,9+(-0,1)) = (-0,9+0,1)(-0,9-0,1) = -0,5 *(-1) = 0,5$