a) x/2(x-3) + x/2x+2 = 2x/ (x+1) (x-3)
b) x+25/2x^2-50 - x+5/x^2-5x = 5-x/2x^2+10x
c) 3/x^2+x-2 - 1/x-1 = -7/x+2
d) 6/x-1 - 4/x-3 = 8/(x-1)(3-x)
e) 1/x-1 - 3x^2/x^3-1 = 2x/x^2+x+1
Loga
Sinh Học lớp 12
