1. а) = ( 4 b + 9 + 2 b - 3) / 6b =(6b +6) / 6b = 6(b+1) / 6 b =(b+1 ) / b;
б)= ( g+ 2 - 6 + g) / ( g - 2 )= -4 / g - 2 = 4 / 2 - g.
в)= a / (a - 3) - 3 /(a - 3) = (a - 3) / (a - 3) = 1.
г) = ( m^2 - n^2) / ( m - n) = ( m+n)(m-n) / ( m-n) = m+n.
2. = ( x^2 + 1 - 5x + 8 - x) / (x-3)^2 = ( x^2 - 6x +9) / ( x-3) ^2= (x-3)^2 / ( x-3)^2 = 1