Simplify [(-2x^-1/2) - (3y^3/2)] [(2x^-1/2) - (3y^3/2)]
and express with positive indices.
Positive indices
2010-02-09 6:07 am
回答 (1)
2010-02-09 7:44 am
✔ 最佳答案
[(-2x^-1/2) - (3y^3/2)] [ (2x^-1/2) - (3y^3/2)] = [- (3y^3/2) - (2x^-1/2)] [ - (3y^3/2) + (2x^-1/2)]
= [- (3y^3/2)]^2 - (2x^-1/2)^2 ........(a-b)(a+b) = a^2 - b^2 is used
= 9y^3 - 4x^-1
= 9y^3 - 4/x
= (9xy^3 - 4)/x
收錄日期: 2021-04-21 22:11:00
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https://hk.answers.yahoo.com/question/index?qid=20100208000051KK01649