Question

Плииииз..
умоляю решите

Answer 1

Б) 3x/(x+3) +3x/(x -3) =

=(3x(x -3) +3x(x +3)) /(x -3)(x +3) =

=(3x² -9x +3x² +9x) /(x-3)(x+3) =

=6x² /(x² -9)


г) =(a -3b)(a-3b) +6ab) /(a -3b) =

=(a² -6ab+9b² +6ab) /(a -3b) =(a²+9b²)/(a-3b)


a) =(a(a+4) -4(a-2)) /4a² =(a²+4a-4a+8) /4a² =

=(a²+8) /4a²