Question

алгебра 8 класс!!!!!!!!!!!!!!

Answer 1

$1) \frac{a}{b^{3} }= \frac{ab^{2} }{b^{5} }$

$2) \frac{m}{9n}= \frac{3mn^{3} }{27n^{4} }$

$3) \frac{6}{7x^{2} y} =\frac{30xy}{35x^{3}y^{2} }$

$4) \frac{8}{m+n}=\frac{8m}{m(m+n)} =\frac{8m}{m^{2}+mn }$

$5) \frac{3}{x-y}= \frac{3(x+y)}{(x-y)(x+y)}=\frac{3x+3y}{x^{2} -y^{2} }$

$6) \frac{m}{m-3n} =\frac{m(m+3n)}{(m-3n)(m+3n)} =\frac{m^{2}+3mn }{m^{2}-9n^{2} }$