若a²-a+1=0,则2a³-a²+a+3=?
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若a²-a+1=0,则2a³-a²+a+3=?若a²-a+1=0,则2a³-a²+a+3=?若a²-a+1=0,则2a³
若a²-a+1=0,则2a³-a²+a+3=?
若a²-a+1=0,则2a³-a²+a+3=?
若a²-a+1=0,则2a³-a²+a+3=?
结果等于2.
2a³-a²+a+3=a³+a³-a²+a+3=a³+3=a²-a+3=a²-a+1+2=2