2/2x+3-3/2x-3+2x+15/4x^2-9
问题描述:
2/2x+3-3/2x-3+2x+15/4x^2-9
答
2/2x+3-3/2x-3-2x+15/9-4x^2
=【2(3-2x)+3(3+2x)-(2x+15)]/(3+2x)(3-2x)
=(6-4x+9+6x-2x-15)/(9-4x^2)
=0