f.2數學,10分！
回答 (4)
2007-01-01 9:43 pm
✔ 最佳答案
12Ax^2-24x+4Ax-8≡6x^2 +Bx +C 12Ax^2+(4A-24)x-8)≡6x^2 +Bx +C
12A=6----(1)
4A-24=B----(2)
C=-8
From (1):A=6/12
A=1/2 ----(3)
Put (3) into (2):4(1/2)-24=B
B= -22
參考: 自己
2007-01-01 9:46 pm
(12x+4)(Ax-2)≡6x^2 +Bx +C
LHS=(12x+4)(Ax-2)
= 12Ax^2+(4A-24)x-8
because (12x+4)(Ax-2)≡6x^2 +Bx +C
therefore
12A=6
A=1/2
put A=1/2
4(1/2)-24=B
B=-22
and C=-8
LHS=(12x+4)(Ax-2)
= 12Ax^2+(4A-24)x-8
because (12x+4)(Ax-2)≡6x^2 +Bx +C
therefore
12A=6
A=1/2
put A=1/2
4(1/2)-24=B
B=-22
and C=-8
收錄日期: 2021-04-12 21:58:47
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070101000051KK01743