由题意可得a2-a-1=0a2=a+1a4=（a2）2=（a+1）2=a2+2a+1=a+1+2a+1=3a+2a3=a•a2=a（a+1）=a2+a=a+1+a=2a+12a4−3a2x+2a3+2a2x−a=-931126a+4−3a2x+22a+1+2a2x−a=-93112672a+672-336xa2=-93a-93-186xa2150xa2=765a+7...