Adding and Subtracting Polynomials

How many terms are in this polynomial?

2x³ - 8x² + 3x - 7

• 7

• 1

• 4

• 2

Add the polynomial (-3x + 4) + (8x - 5)

• 5x - 9

• 5x - 1

• 11x - 1

• 11x - 9

Add the following polynomials

( 5x² - 4x + 3 ) + ( 3x² + 2x - 6 )

• 8x² - 2x - 3

• 2x² - 2x - 3

• 8x² + 6x - 9

• 8x² - 2x - 9

(2x + 5y - z) + (-6x - 4y + 7z)

• -4x +6y + 6z

• 4x + y + 6z

• -4x - y + 6z

• -4x + y + 6z

Add the following polynomials:

( x³ - 2x² + 3 ) + ( 2x³ + 3x² -1 )

• 3x³ - 2x² + 3x + 2

• 3x³ + x² + 2

• 3x³ - 5x² - 2

• 3x³ - x² + 1

Add the following polynomials

( x³ - 6x² + 3 ) + ( 3x³ + 4x - 1 )

• 4x³ - 2x² + 2

• 4x³ - 6x² + 4x + 2

• -2x³ + 2x + 2

• 4x³ - 2x² - 2

• None of these

Simplify each expression. (- b⁴ + 6b³ + 6 ) - ( -6b⁴ + 8b³ + 2)

• 4b⁴ - 2b³ + 7
• 5b⁴ - 2b³ + 4
• b⁴ - 2b³ + 7
• 5b⁴ - 2b³ + 7

When 2a² + 5a + 3 is subtracted from 1a² - 3a - 4 the result is

• 3a² + 2a - 1
• -1a² - 8a - 7

• 3a² + 8a + 7
• a² + 2a - 1

When 3x + 4y - 3z is subtracted from 2x - 6y + 7z the result is

• x + 10y - 10z
• -x +10y - 10z
• x -10y - 10z
• -x -10y + 10z

Find the difference. 
(3- 2x + 2x²) - (4x -5 +3x²)

• x_² + 6x + 8
• 2x² + 5x - 7
• -x² -6x + 8
• -2x² + 11x - 4