Year 9 Solving Quadratic Equations

Solve the equation x² = 16

• x = 4 only

• x = -4 only

• x = 4 and x = -4

• x = 8 and x = -8

Solve the equation x² + 9x + 14 = 0

• x = 7 and x = 2

• x = -7 and x = -2

• x = 6 and x = 3

• x = -6 and x = -3

• x = 12 and x = -2

Solve the equation x² + 4x = 0

• x = 0 and x = 4

• x = 0 only

• x = 4 only

• x = 0 and x = -4

Solve the equation x² - 64 = 0 (select all relevant answers)

• x = 8

• x = -8

• x = 16

• x= -16

• x = 4

Select all correct solutions to the equation x² - 5x = 0

• x = 0

• x = 5

• x = -5

• x = 10

Select all correct solutions to the equation x² - 3x -10 = 0

• x = 5

• x = -2

• x = -5

• x = 2

Solve the equation 4x² = 36

• x = 3 and x = -3

• x = 4 and x = -4

• x = 5 and x = -5

• x = 6 and x = -6

Solve the equation 2x² + 6x = 0

• x = 0 only

• x = 3 only

• x = 0 and x = 3

• x = 0 and x = -3

Solve the equation 2x² - 18x + 36 = 0

• x = 6, x = 3

• x = -6, x = -3

• x = 6, x = -3

• x = -6, x = 3

If ONE of the solutions to an equation is x = 2, what could the equation be? (select all correct answers)

• x² + 5x + 6 = 0

• x² = 4

• 3x² - 6x = 0

• x² - 9x +14 = 0

• x² + 2x = 0