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