Unit 9 - Lesson 3 Solving Quadratics with Complex Numbers

Solve for x: 

• x = {-4, -1}
• x = {-1, -4}
• x = {2+i, 2-i}
• x = {-2+i, -2-i}

Solve for x:

• x = {-3+2i, -3-2i}
• x = {7, 6}
• x = 2±i√3
• No solution

Solve for x: x² - 5x + 8 = 0

• x = (-5±i√7)/2
• x = (5±i√7)/2
• x = (8±i√7)/2
• x = (5±√57)/2

Which of the following values will make x² + 6x + ___ a perfect trinomial square?

• 3
• 6
• 9
• 36

Find the roots: x² - 8x - 20 = 0

• x = {10, -2}
• x = {-10, 2}
• x = (8±√12)/2
• x = {6, 1}