3/X-3-2/X-2=1/X-1
问题描述:
3/X-3-2/X-2=1/X-1
答
3/x-3 - 2/x-2= 1/x-1 1/x-1 + 2/x-2 =3/x-3 (x-2)(x-3)+2(x-1)(x-3)=3(x-1)(x-2) x^2-5x+6+2(x^2-4x+3)=3(x^2-3x+2) x^2-5x+6+2x^2-8x+6=3x^2-9x+6 3x^2-13x+12=3x^2-9x+6 -4x=-6 x=1.5