化简求值:(3x⼀x-2-x⼀x+2)⼀x⼀x^2-4,请选择一个适当的数代入求值

2025-05-18 02:20:15
推荐回答(1个)
回答(1):

(3x/x-2-x/x+2)/x/x^2-4
=(3x/x-2-x/x+2)*x^2-4/x
=(3x/x-2-x/x+2)*(x-2)(x+2)/x
=3(x+2)-(x-2)
=3x+6-x+2
=2x+8

当x=0时,原式=8