(m^2-1)x^2-(m+1)x+8=0æ¯å
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m^2-1=0ä¸m+1â 0
(m+1)(m-1)=0ä¸m+1â 0
m-1=0
m=1
(1+1)x+8=0
2x=-8
x=-4
199(m+x)(x-2m)+m
=199(1-4)(-4-2Ã1)+1
=199(-3)(-6)+1
=3583
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å¦æ代æ°å¼æ¯ï¼199(m+x)(x-2m)-m
é£ä¹ï¼199(m+x)(x-2m)-m
=199(1-4)(-4-2Ã1)-1
=199(-3)(-6)-1
=3581
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