Solving Cube Polynomials

x³ - 5x² = 4x - 20 (Make sure to select all answers)

• 5

• -5

• 2

• -2

x³ + 729 = 0 (Make sure to select all answers)

• x = 9

• x = -9

• x = 27

• No Real Solution

x³ - 343 = 0 (Make sure to select all answers)

• x = 19

• x = -7

• x = 7

• No Real Solution

3x³ - 15x² = -x + 5 (Make sure to select all answers)

• x = 1/3

• x = -1/3

• x = -5

• x = 5

Mathematical Equivalence

OFF

Factor this sum of cubes:
2x³ + 128

• 2(x³ + 64)

• (x + 4)(x² - 4x + 16)

• 2(x - 4)(x² + 4x + 16)

• 2(x + 4)(x² - 4x + 16)

Factor this difference of cubes:
x³ - 343

Mathematical Equivalence

ON

In symbol, four times the cube of a number is the same as:

• 4 + x

• 3x - 4

• 4x

• 4x³

Factor completely:
2x³ + 5x² - 8x - 20

• (x² - 4)(2x + 5)

• (2x - 5)(x² + 4)

• (2x² - 4)(x + 5)

• (x - 2)(x + 2)(2x + 5)

Find all zeros for the polynomial
P(x) = x³ -3x²-5x+15

• 3, √5 

• 3, √5, -√5

• -3, √5, -√5

• -3, 5i, -5i