Lesson 24-3 Subtracting Polynomials

Lesson 24-3 Subtracting Polynomials

I Can...

• Subtract polynomials algebraically

To subtract a polynomial you add its opposite , or subtract each of its terms.

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Multiple Choice

Subtract (2x³ + 8x² + x + 10) − (5x² − 4x + 6) horizontally

• 2x³ + 3x² + 5x - 4

• 2x³ + 4x² + 5x + 4

• -3x³ + 3x² + 5x - 4

• 2x³ + 3x² + 5x + 4

Multiple Select

(5x² − 5) − (x² + 7)

• 4x² - 12

• 4x² + 12

Poll

Subtract the polynomial

(y²+ 3y + 8) − (4y² − 9)

• 5y² + 3y - 1

• -3y² + 3y - 17

• 4y² + 12y + -1

Open Ended

Write two polynomials whose difference is 6x + 3

Open Ended

Critique the reasoning of others.

Gil used the vertical method to subtract

(3x² − 5x + 2) − (x² + 2x + 4) as shown below.

Identify Gil’s error.

3x² − 5x + 2

−x² + 2x + 4

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2x² − 3x + 6