已知,a是方程x²-3x+1=0的根求2 a³×a²-5a²×a²+2a³-8a²/a²+1
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![已知,a是方程x²-3x+1=0的根求2 a³×a²-5a²×a²+2a³-8a²/a²+1](/uploads/image/z/1168926-6-6.jpg?t=%E5%B7%B2%E7%9F%A5%2Ca%E6%98%AF%E6%96%B9%E7%A8%8Bx%26%23178%3B-3x%2B1%3D0%E7%9A%84%E6%A0%B9%E6%B1%822+a%26%23179%3B%C3%97a%26%23178%3B-5a%26%23178%3B%C3%97a%26%23178%3B%2B2a%26%23179%3B-8a%26%23178%3B%2Fa%26%23178%3B%2B1)
已知,a是方程x²-3x+1=0的根求2 a³×a²-5a²×a²+2a³-8a²/a²+1
已知,a是方程x²-3x+1=0的根求2 a³×a²-5a²×a²+2a³-8a²/a²+1
已知,a是方程x²-3x+1=0的根求2 a³×a²-5a²×a²+2a³-8a²/a²+1
a2-3a=-1
a2=3a-1
2a5-5a4+2a3-8a2/a2+1=
-2a3+a4+2a3-8a2/a2+1
=a4-8a2/a2+1
=3a3-a2-8a2/a2+1
=3a3-9a2/a2+1
=9a2-3a-9a2/3a-1+1
=-3a/3a=-1