Problems from Definition and classification of polynomials

Sort the following polynomials, specifie their degree and find out if they are finished and/or homogeneous:

  1. p(x)=3x3x2+1+x4
  2. q(x,y)=3xy3x24y2
  3. r(x,y)=10xxyx225y2+y
See development and solution

Development:

1) Ordered: No, an element of degree 1 (3x) is placed before an element of degree 2 (3x2).

Degree: max{1,2,0,4}.

Completed: Degree elements 1,2,0,4 exist.

Homogeneous: We can find different degree elements.

2) Ordered: Yes, every element has degree 2.

Degree: max{2,2,2}.

Completed: We can only find elements of degree 2.

Homogeneous: All the elements have the same degree .

3) Ordered: No, there is an element of degree zero (10) that is placed before an element of degree one (x).

Degree: max{0,1,2,2,2,1}.

Completed: There are elements of degree 1,2,0.

Homogeneous: There are elements of different degree .

Solution:

1) The ordered polynomial would be p(x)=x43x2+3x+1

Degree: 4

Completed: No. An element of degree 3 is missing.

Homogeneous: No.

2) Ordered: Yes

Degree: 2

Completed: No. Elements of degree 1 and 0 are missing.

Homogeneous: Yes.

3) The ordered polynomial would be r(x,y)=xyx225y2x+y+10

Degree: 2

Completed: Yes.

Homogeneous: No.

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