Question

已知:x=3分之根号2-1,求x^2-x-6分之x+2的值

已知:x=3分之根号2-1,求x+2分之x^2-x-6

Answer 1

(X+2)/(X²-X-6)
=1/(X-3)
=1/[(√2-1)/3-3]
=-(30+3√2)/8

有疑问，请追问；若满意，请采纳，谢谢！

追问

是x+2分之x^2-x-6

追答

(X+2)/(X²-X-6)
=(X-3)(X+2)/(X+2)
=X-3
=(√2-1)/3-3
=√2-10/3