Adding and Subtracting Polynomials and Figuring Out Errors

Combine like terms to simplify:

(5x + 2) + (4x + 5)

• 9x -7

• -9x-11

• 9x+7

• x+7

(10m - 7n) + (2m - n)

• 12m - 8n

• 12m - 6n

• 12m + 8

• 12m - 6

Combine like terms to simplify:

(12x + 7) + (3x + 8)

• 15x + 15

• 15x + 7

• 15x - 15

• 15x + 8

(4x + 3) + (x - 5)

• 5x + 2

• 5x - 2

• 5x + 8

• 5x - 8

Combine like terms to simplify: (9x + 11) + (x - 3)

• 10x + 14

• 9x + 14

• 9x + 8

• 10x + 8

Find the sum.

(3x³ + 3x² – 4x + 5) + (x³ – 2x² + x – 4)

• 4x³ + 1x² – 3x + 1

• 2x³ + 1x² - 5x + 9

• 6x³ + 1x - 1x² - 3

• 3x⁵ +1x - 1x⁵ - 3x

( 6x + 3 ) + ( - 2x + 5 )

• 8x + 8

• 4x + 9

• 4x + 10

• 4x + 8

( 4x³ - 5x² + 3x ) + ( - 2x³ - x² + 6x )

• 2x³ - 6x² - 9x

• 2x³ + 6x² + 9x

• -2x³ - 6x² + 9x

• 2x³ - 6x² + 9x

Add

( 2x - 4xy + 3y ) + ( x + 5xy - 5y )

• 3x + 9xy + 8y

• 3x - xy + 8y

• 3x + xy - 2y

• x - 9xy - 2y

(4a + 6ab - b) + ( - 2a - ab + 3b)

• 2a + 7ab + 2b

• 6a + 5ab - 2b

• 6a + 7ab + 4b

• 2a + 5ab + 2b