factorize the expression.
81x^y-16y(x-y)^2
help me,^^
math f.3
2009-11-01 1:55 am
回答 (1)
2009-11-01 2:03 am
✔ 最佳答案
81x^2y - 16y(x - y)^2= y[81x^2 - 16(x - y)^2]
= y[(9x)^2 - (4x - 4y)^2]
= y(9x - 4x + 4y)(9x + 4x - 4y)
= y(5x + 4y)(13x - 4y)
收錄日期: 2021-04-24 10:08:48
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20091031000051KK01197