Quadratic Root

How many x-intercepts does it have?

• 0

• 1

• 2

• 4

How many x-intercepts does it have?

• 0

• 1

• 2

• 5

What is the discriminant of -2x² − x − 1 = 0 ?

• 76

• -7

• 9

• none of these

Solve by factoring:

x² - 9x = 0

• x = 9

• x = {0, 9}

• x = {-9, 0}

• x = -9

Find the roots by factoring.

12x = 9x² + 4

• (2/3, 0)

• (2/3, 4)

• (3, 0)

3 For the function above, is the discriminant positive, negative, or zero?

• Positive

• Negative

• Zero

Solve for x: 3x² - 6x + 6 = 0

• x = 1 ± i

• x = 3, -6

• x = 4.8, 2.7

• Undefined

• x = {-4, -1}

• x = {-1, -4}

• x = {2 + i, 2 - i}

• x = {-2 + i, -2 - i}

• x = {-3 + 2i, -3 - 2i}

• x = {7, 6}

• x = 2 ± i√3

• No solution

All imaginary roots comes in pairs.

• True

• False