Simple Quadratic Equations with Complex Roots

How does the quadratic equation show that there should be two complex solutions?

• b²

• ±

• b² - 4ac

• 2a

What is this formula?

• This is the speed of light formula.

• This is the quadratic formula.

• This is the zero product property.

• This is scary.

• -5i
• 5
• 5i
• -5

Solve by taking square roots:

k² - 6 = -50

• k = ±4i√11

• k = ±4√11

• k = ±2i√11

• k = ±2√11

Solve by taking square roots.

x² = -121

• ± 11

• ± 11i

• ± 12

• 11i

Solve -2x² + 4x = 9

• (2 - i√14)/2   ,   (2 + i√14)/2

• (2 - i√-56)/2   ,   (2 + i√-56)/2

• (2 - i√-14)/2   ,   (2 + i√-14)/2

• (2 - √14)/2   ,   (2 + √14)/2

What is the discriminate of f(x) = 3x² - 5x + 8
and how many solutions does the function have?

• discriminate = -71 and two imaginary solutions

• discriminate = -121 and has two imaginary solutions

• the discriminate = - 71 and has two real solutions

• the disctiminate = -121 and has two real solutions