How do you write a polynomial in standard form, then classify it by degree and number of terms 4x^2-3x^3+6x+7?

1 Answer
Mar 6, 2016

The expression in standard form is -3x^3 + 4x^2 + 6x + 7.

There are 4 non-zero terms.

The degree is 3.

Explanation:

There are 4 terms. They are

  1. -3x^3.
  2. 4x^2.
  3. 6x.
  4. 7.

A polynomial in standard form should meet the following criteria:

  • It should be expressed as a sum of, powers of x (or any other variable used).

For example, this is in standard form

x^2 - 4x + 3,

not

(x-1) * (x-3),

nor

(x-2)^2 - 1.

  • The term with the highest power goes first.

For example, this is in standard form

x^2 - 4x + 3,

not

3 - 4x + x^2.

The polynomial 4x^2-3x^3+6x+7 is not in standard form, as the term -3x^3 comes after the term 4x^2. Exchanging the two terms will solve the problem. So it becomes -3x^3+4x^2+6x+7.

The degree of polynomial is the highest power throughout the polynomial.

Since the powers are in decreasing order for a polynomial, the degree would be the power of the first term, which is a.k.a. the leading term.

The first term is -3x^color(red)(3). The degree is color(red)(3).