Question

Is the work shown below correct? Explain your answer.

(11 + 2i ) – (3 – 10i )
= 11 + 2i – 3 – 10i
= (11 – 3) + (2i – 10i)
= 8 – 8i

Answer 1

The work shown is not correct. When the distributive property was used, the -10i should have changed to +10i, making the sum 8+12i.

Explanation:

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Answer 2

Sample response: The work shown is not correct. When the distributive property was used, the -10i should have changed to +10i, making the sum 8+12i.