更新1:
S2 Identity (2x - A)(2x+4) - Bx + 25 ≡ (x - C)^2 + C^2 求A,B,C的數值
S2 Identity (2x - A)(2x+4) - Bx + 25 ≡ (x - C)^2 + C^2?
回答 (1)
2016-01-15 2:19 am
(2x - A)(2x+4) - Bx + 25 ≡ (x - C)^2 + C^2
left=4x^2 -8x -2Ax-4A-Bx+25
left=4x^2 -(8+2A+B)+(25-4A)
right=x^2 +2Cx+C^2+C^2
right =x^2 +2Cx+2C^2
The question is a problem because the x^2 are not same. There are no root.
left=4x^2 -8x -2Ax-4A-Bx+25
left=4x^2 -(8+2A+B)+(25-4A)
right=x^2 +2Cx+C^2+C^2
right =x^2 +2Cx+2C^2
The question is a problem because the x^2 are not same. There are no root.
收錄日期: 2021-04-18 14:19:07
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20160114061109AAnoWCp