中二數學多項式

2009-10-10 3:36 am

請問12x^2 乘 y^2 + 4xy^3 - 6x^2乘 2y = ?

回答 (3)

2009-10-10 5:42 am

✔ 最佳答案

12x^2 * y^2 + 4xy^3 - 6x^2 * 2y
=12x^2y^2 + 4xy^3 - 12x^2y
=4xy(3xy+ y^2 - 3x)

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2009-10-11 1:54 am

12x^2 * y^2 + 4xy^3 - 6x^2 * 2y
=12x^2y^2+48x^3y^3-72x^4*2y
=24x^2y^3+96x^3y^4-144x^4y
=24x^2y(y^2+5xy^3-6x^2)

參考: 自己

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2009-10-10 4:24 am

12x^2 乘 y^2 + 4xy^3 - 6x^2乘 2y
=12x^2-6x^2乘2y乘y^2+4乘y^3
=6x^2乘3y^2+4xy^3

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