求式子x+2/x-3乘x2-6x+9/x2-4
问题描述:
求式子x+2/x-3乘x2-6x+9/x2-4
答
[(x+2)/(x-3)][(x²-6x+9)/(x²-4)]
=(x+2)(x-3)²/[(x-3)(x+2)(x-2)]
=(x-3)/(x-2)