此方程怎么解勒。。。求手写过程不跳步太谢谢了!

2025-05-10 14:35:38
推荐回答(3个)
回答1:

回答2:

(x²-2)²-2=x
x^4-4x²+4-2-x=0
x^4-4x²-x+2=0
x²(x²-4)-(x-2)=0
x²(x-2)(x+2)-(x-2)=0
(x-2)[x²(x+2)-1]=0
(x-2)[(x³+x²)+(x²-1)]=0
(x-2)[x²(x+1)+(x-1)(x+1)]=0
(x-2)(x+1)(x²+x-1)=0
所以x=2,或-1,或(-1±√5)/2

回答3:

3(x+9)=33 x+9=33÷3 x+9=11 x=11-9 x=2