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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?
Aiko incorrectly used the commutative property by changing the order of the two complex numbers.
Aiko incorrectly used the associative property by changing the order of the two complex numbers.
Aiko incorrectly used the identity property by combining the real number and the coefficient of the imaginary part.
Aiko incorrectly used the distributive property by combining the real number and the coefficient of the imaginary part.

Sagot :

MathGeek99idn

Answer:

Option 5

Step-by-step explanation:

Aiko incorrectly used the distributive property by combining the real number and the coefficient of the imaginary part.

It is wrong because 'i' is with 5 and 7 and it is not present in -3 and 4

(4 - 3) + i(5 + 7) would have been the correct way to write it

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