(x+1)^4-9（x+1）²+8=0【（x+1）²-8】[(x+1)²-1]=0(x+1+2√2)(x+1-2√2)(x+1+1)(x+1-1)=0x(x+1+2√2)(x+1-2√2)(x+2)=0x1=0x2=-1-2√2x3=-1+2√2x4=-2如果本题有什么不明白可以追问,请及时点击右下角...