Complex Numbers Quiz

i squared is equal to

-1

(−5 + 3i) − (4 − 5i)

-9 + 8i

(−1 + i) − (−7 + 4i) − 5

1 - 3i

4 - i / 6 - 3i

3/5 + 2/15i

Square root of -18

3i square root 2

(−1 + 6i) + (5 − 2i) − (8i)

4 - 4i

(-i) + (6i)

5i

(-3 + 2i)(3 - 8i)

7 + 30i

(3 - i)(4 + 3i)(5 - 2i)

85 - 5i

8 + 6i / 6 - 2i

9/10 + 13/10i

What method can you use when multiplying?

FOIL method

What is a complex number?

a+bi

a+bi = (Complex Conjugate)

a-bi

First step when subtracting?

distribute the minus sign into the second complex number

A real number can be a ____, ____, or ____

fraction, decimal value, integer

Square root of -1

i

When adding, are real parts and imaginary parts combined?

no

What is the product of a complex number and its conjugate?

real number

What is an imaginary number?

value that has a negative and square root

What is a conjugate of a complex number?

when the imaginary part is made opposite

(−6 − 2i) + (6 − 5i)

−7i