Quadratic Formula and Complex Numbers

Find the sum.
(5-2i) + (-7+8i)

• -2+6i
• 12+6i
• -35-16i²
• -35 -16i

Which expression is equivalent to (3 - 4i) – (4 + 5i)?

• -1-9i

• -9-i

• 7+i

• 7-9i

Multiply:
(2-5i)(2+5i)

• 29
• 4 - 25i
• 25 - 10i
• -21

(2+i)(3-4i)

• 10 - 5i

• 5 -10i

• 2 + 5i

• 2+11i

• -1-i

i²=

• -1

• 1

i =

• -1

• 1

• ±6i

• ±6

• ±i

What is the quadratic formula?

• b² - 4ac

• ax² + bx + c

Use the quadratic formula to find the solutions for

-x² - 5x + 12 = 0

• No Real Solution

• 
• 
•