Arrange the following polynomials in descending power of x
(a)
(2x-3)+(-x+5)
(b)
3x^3y - 2xy^3 + 4x^2 - 5
math f.1
2008-07-14 6:42 pm
回答 (2)
2008-07-14 6:56 pm
✔ 最佳答案
(a)(2x - 3) + (-x + 5)
= 2x - 3 - x + 5
= x + 2
(b)
3x^3y - 2xy^3 + 4x ^ 2 - 5
= 3x^3y + 4x^2 - 2xy - 5
參考: me
2008-07-14 6:49 pm
(a) very simple
(2x - 3) + (-x) + 5 = 2x - 3 -x +5
= x +2
(b) this question should pay attention on power of x
3x^3y - 2xy^3 + 4x^2 - 5 = 3x^3 +4x^2 -2y^3x -5
2008-07-14 10:50:08 補充：
3x^3y - 2xy^3 + 4x^2 - 5 = 3 ( x^3 ) + 4 ( x^2 ) - 2y^3 (x) -5
VERY CLEAR
(2x - 3) + (-x) + 5 = 2x - 3 -x +5
= x +2
(b) this question should pay attention on power of x
3x^3y - 2xy^3 + 4x^2 - 5 = 3x^3 +4x^2 -2y^3x -5
2008-07-14 10:50:08 補充：
3x^3y - 2xy^3 + 4x^2 - 5 = 3 ( x^3 ) + 4 ( x^2 ) - 2y^3 (x) -5
VERY CLEAR
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