Maths Question
回答 (2)
2006-12-17 11:10 pm
✔ 最佳答案
5xy(x+y)-25x²y(x+y)²=5xy(x+y)-5xy(x+y)*5x(x+y) where * -- 乘
=5xy(x+y)[1-5x(x+y)] -------- Select Common factors of two terms
=5xy(x+y)(1-5x² -5xy)
= - 5xy(x+y)(5x² +5xy-1)
2006-12-17 10:56 pm
5xy(x+y)-25x²y(x+y)²
=5xy(x+y)[1-5x(x+y)]
=5xy(x+y)(1-5x² -5xy)
=-5xy(x+y)(5x² +5xy-1)
=5xy(x+y)[1-5x(x+y)]
=5xy(x+y)(1-5x² -5xy)
=-5xy(x+y)(5x² +5xy-1)
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