已知2x*3-16=2(x-2)(x*2+2x+4)
hence,factorize 2x*3-13x*2+36
maths-factorize
2008-07-31 10:23 pm
回答 (1)
2008-07-31 11:10 pm
✔ 最佳答案
2x*3-13x*2+36 = (2x^3-16) -(13x^2-52)= 2(x-2)(x^2+2x+4) - 13(x^2 -4)
= 2(x-2)(x^2+2x+4) - 13(x+2)(x-2)
= (x-2)( 2x^2+4x+8 -13x -26)
= (x-2)(2x^2-9x -18)
2008-07-31 15:11:17 補充：
a^2 - b^2 = (a+b)(a-b)
收錄日期: 2021-04-23 21:26:21
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080731000051KK01533