12x^2 times y^2 add 4xy^3 reduce with 6x^2 times y=?
Thank you!
F.2 Maths polynomial
2009-10-11 11:58 pm
回答 (1)
2009-10-16 12:28 am
✔ 最佳答案
(12x^2)(y^2) + 4xy^3 - (6x^2)(y)= 12(xy)^2 + (4xy)(y^2) - (6xy)(x)
= (2xy)(6xy + 2y^2 - 3x)
= (2xy)[(2y(3x+y) - 3x]
= (2xy)[(2y(3x+y) - (3x+y) + y]
= (2xy)[(2y-1)(3x+y) + y)]
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https://hk.answers.yahoo.com/question/index?qid=20091011000051KK01181