先化简,再求值:(x^2⼀x-3-9⼀x-3)*1⼀x^2+3x,其中x=1⼀3

2024-12-15 07:07:46
推荐回答(1个)
回答1:

(x^2/x-3-9/x-3)*1/x^2+3x
=(x²-9)/(x-3)*1/[x(x+3)]
=1/x
=3