(x-1)^2
--------------
X^2+6x-7
2x^2-7x+6
-----------------
(2-x)^2
8x-12y
----------------
6x^2-7xy-3y^2
simplify math
2010-11-05 4:00 am
回答 (2)
2010-11-05 7:57 am
(x-1)^2
--------------
X^2+6x-7
= (x-1)^2 / [(x+7)(x-1)]
= (x-1) / (x+7)
2x^2-7x+6
-----------------
(2-x)^2
= [(2x-3)(x-2)] / (2-x)^2
= [-(2x+3)(2-x)] / (2-x)^2
= (3-2x) / (2-x)
8x-12y
----------------
6x^2-7xy-3y^2
= [4(2x-3y)] / [(2x-3y)(3x+y)]
= 4 / (3x+y)
--------------
X^2+6x-7
= (x-1)^2 / [(x+7)(x-1)]
= (x-1) / (x+7)
2x^2-7x+6
-----------------
(2-x)^2
= [(2x-3)(x-2)] / (2-x)^2
= [-(2x+3)(2-x)] / (2-x)^2
= (3-2x) / (2-x)
8x-12y
----------------
6x^2-7xy-3y^2
= [4(2x-3y)] / [(2x-3y)(3x+y)]
= 4 / (3x+y)
2010-11-05 4:25 am
(x-1)^2/x^2+6x-7
(x-1)^2/(x-1)(x+7)
(x-1)(x+7)
____________
2x^2-7x+6/(2-x)^2
(2x-3)(x-2)/(x-2)^2
(2x-3)/(x-2)
_________________
8x-12y/6x^2-7xy-3y^2
4(2x-3y)/(3x+y)(2x-3y)
4/(3x+y)
2010-11-15 20:15:16 補充：
001是魔龍帝齊格益力多
(x-1)^2/(x-1)(x+7)
(x-1)(x+7)
____________
2x^2-7x+6/(2-x)^2
(2x-3)(x-2)/(x-2)^2
(2x-3)/(x-2)
_________________
8x-12y/6x^2-7xy-3y^2
4(2x-3y)/(3x+y)(2x-3y)
4/(3x+y)
2010-11-15 20:15:16 補充：
001是魔龍帝齊格益力多
收錄日期: 2021-04-23 23:15:47
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20101104000051KK01051