The student made an error when multiplying the imaginary units. The correct way to simplify the expression is as follows:
(−3i)(−5i)
= (-3)(-5)(i)(i)
= 15i²
Since i² is equal to -1, we can simplify further:
= 15(-1)
= -15
Therefore, the correct simplified expression is -15.
A student has simplified the following expression incorrectly.
Identify the mistake that was made and simplify the expression correctly. Show all necessary steps in the space provided.
(−3i)(−5i)
15i
1 answer
3 answers