1.SIMPLIFY {1/[3(r+1)]} - {2/[6/(1+r)]}
2.Factorize the following expression.
a)-6f^3+3fg+9f
b)2xy^2+2xy+4x^2y
F.2 Maths
2007-10-04 3:57 am
回答 (2)
2007-10-04 5:33 am
✔ 最佳答案
Solution:1. {1/[3(r+1)]} - {2/[6/(1+r)]}
={1/[3(r+1)]} - 2x[(1+r)/6]
={1/[3(r+1)]} -[(1+r)/3]
=(1/3)-(1/3)
=0
2a. -6f³+3fg+9f
=3f x -2f² + 3f x g + 3f x 3
=3f(-2f²+g+3)
2b. 2xy² + 2xy +4x^2y
=2xy² + 2xy +4(x²)(x^y)
=2x(y²)+2x(y)+2x(2x)(x^y)
=2x[y²+y+x^(y+1)]
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2007-10-04 4:09 am
2a.3f(-2f^2+g+3)
2b.2xy(y+1+2x)
2b.2xy(y+1+2x)
收錄日期: 2021-04-13 16:58:55
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https://hk.answers.yahoo.com/question/index?qid=20071003000051KK03310