急...中一數學題

🎓 學業台小學及中學教育

[匿名]

2007-11-14 6:11 pm

1. 2*a*a*a-a*a

2. 5*x*y*y*x*6*y

唔該各位數學高手幫下我啦...
我聽日就要考數學....

更新1:

希望各位可以將個步驟詳細咁例出黍.... THX!!!!

回答 (3)

活力先生

2007-11-14 6:17 pm

✔ 最佳答案

1. 2*a*a*a-a*a
= 2a^(1+1+1) - a^(1+1)
= 2a^3 - a^2
=a^2(2a-1)
2. 5*x*y*y*x*6*y
=(5.6)x^(1+1)y^(1+1+1)
= 30(x^2)(y^3)

參考: me

👍 0 👎 0

[匿名]

2007-11-15 2:53 am

1.2*a*a*a-a*a
=2*a*a*a
=2a^3

2.5*x*y*y*x*6*y
=30x^2*y^3

👍 0 👎 0

Mike

2007-11-14 6:36 pm

1. 2*a*a*a-a*a
=2a^3-a^2

2. 5*x*y*y*x*6*y
=5*6*x*x*y*y*y
=30x^2y^3

👍 0 👎 0