Polynomial Addition and Subtraction Math Example 3

Follow the full solution, then compare it with the other examples linked below.

Example 3

easy
Add (7x+3)+(−2x+9)(7x + 3) + (-2x + 9).

Solution

  1. 1
    Combine like terms: (7x−2x)+(3+9)=5x+12(7x - 2x) + (3 + 9) = 5x + 12.
  2. 2
    Check: At x=0x = 0: 3+9=123 + 9 = 12 ✓

Answer

5x+125x + 12
Adding linear polynomials involves combining the xx terms together and the constant terms together.

About Polynomial Addition and Subtraction

Adding or subtracting polynomials by combining like terms—terms with the same variable raised to the same power.

Learn more about Polynomial Addition and Subtraction →

More Polynomial Addition and Subtraction Examples

Example 1 easy

Add [formula].

Example 2 medium

Subtract [formula].

Example 4 hard

Simplify [formula].

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