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30 questions
What is the simplified form of (-9 + 5i) + (3 -2i)
-12 + 31i
-6 + 3i
-11 + 7i
5 - 3i
What is the simplifies form of (11 - 7i) - (-3 + 12i)
8 - 19i
8 + 5i
13- 19i
14 -19i
What is the simplified form of (-6i)(3i)
-18
-18i
18
-18i2
What is the simplified form of (-3 + 2i)(1- 4i)
-2 - 2i
5 + 14i
-11 -10i
-3 -8i
What is the simplified form of (8 -3i)2?
73
16 - 6i
55 + 48i
55 - 48i
What is the simplified form of the above?
7/10 + 11/10 i
13/10 +1/10 i
5/4 - 3/2i
7/10 - 11/10 i
3i(4 - i)
9i
-3 +12i
12 - 3i
3 + 12i
Simplify (11 + 5i)(11 - 5i)
121 -110i
121 + 110i
146
121 - 25i2
Simplify i37
1
i
-i
-1
Simplify i24
i
1
-1
-i
Simplify i43
1
i
-i
-1
If z1=2+5i and z2=3−21, what is z1×z2 as a single complex number.
−4+11i
6−10i
16−19i
16+11i
A complex number can be expressed as a + bi. What does a represent?
the real part of the complex number
the imaginary part of the complex number
depends on the sign of the number
the square root of the complex number
Leon is asked to simplify √-120. A good first step would be to...
divide 120 by 2
replace the negative with an i on the outside of the radical
take the square root of -120
graph y = √-120
The complex conjugate can be found by...
Changing the sign of both a and b
Changing the sign of a
Changing the sign of b
Switching the a and b values
If you are adding two complex numbers you should
add all the numbers together then divide by 2
add only the real numbers and subtract the complex numbers
add only the complex numbers and subtract the real numbers
add only the real numbers together and then add only the complex numbers together then stop
You can simplify powers of i by... (Choose all correct answers)
dividing the exponent by 4 then use the remainder to determine the value
multiplying the exponent by 3 and then subtracting 2
using the clock diagram and counting off the power until you get to the power in the problem
taking the square root
Like terms have ________.
only the same variable
the same power but different variables
the same variable but different powers
the same variable at the same power
All imaginary numbers are like terms.
true
false
When we simplify divisions of complex numbers we mutliply both the numerator and the denominator by the denominator.
true
false
Quadratic equations with a linear and a quadratic variable are more easily solved using square roots.
true
false
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