解数学M^2-M-1=0,M^5-5M-3=?
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解数学M^2-M-1=0,M^5-5M-3=?解数学M^2-M-1=0,M^5-5M-3=?解数学M^2-M-1=0,M^5-5M-3=?M^5-5M-3=M^3(M^2-M-1)+M^4+M^3-5
解数学M^2-M-1=0,M^5-5M-3=?
解数学M^2-M-1=0,M^5-5M-3=?
解数学M^2-M-1=0,M^5-5M-3=?
M^5-5M-3
=M^3(M^2-M-1)+M^4+M^3-5M-3
=M^2(M^2-M-1)+2M^3+M^2-5M-3
=2M(M^2-M-1)+3M^2-3M-3
=3(M^2-M-1)
=0
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解数学M^2-M-1=0,M^5-5M-3=?
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