(x-4)
2
=x
2
-8x+16; ¡@(3x+1)(x-4)=3x
2
-12x+x-4=3x
2
-11x-4;
m(x-4)
2
+n(3x+1)(x-4)=11x
2
-49x+20 ¬OùÚµ¥¦¡, ¥ý¼¶}¥ª¤è¦A¶°¶µ, ¤ñ¸û x¶µ©M±`¼Æ¶µ±o¨â½u©Ê¤èµ{
(m+3n)x
2
+(-8m-11n)x+(16m-4n)=11x
2
-49x+20;¡@-8m-11n=-49 ¤Î 16m-4n=20
¸Ñ¤§¥i±o m=2 ¤Î n=3
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