Operations with Complex Numbers Answers
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Which property of addition is shown below?a + bi + c + di = a + c + bi + di
A
identity propertyB
associative propertyC
commutative propertyD
inverse property2
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Which property of addition is shown below?If x = a + bi and y = –a – bi, x + y = 0.
A
commutative propertyB
identity propertyC
associative propertyD
inverse property3
Evaluate when and .
A
29 i
B
29 i minus 20
C
Negative 21 i
D
29
4
Donte simplified the expression below.What mistake did Donte make?
A
He did not apply the distributive property correctly for 4(1 + 3i).B
He did not distribute the subtraction sign correctly for 8 – 5i.C
He added the real number and coefficient of i in 4(1 + 3i).D
He added the two complex numbers instead of subtracted.5
Aiko is finding the sum (4 + 5i) + (–3 + 7i). She rewrites the sum as (–3 + 7)i + (4 + 5)i. Which statement explains the error Aiko made by using a mathematical property incorrectly?
A
Aiko incorrectly used the commutative property by changing the order of the two complex numbers.B
Aiko incorrectly used the associative property by changing the order of the two complex numbers.C
Aiko incorrectly used the identity property by combining the real number and the coefficient of the imaginary part.D
Aiko incorrectly used the distributive property by combining the real number and the coefficient of the imaginary part.Did you find these answers helpful?
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