For homework, Crystal must simplify the expression
. She gets the answer 3, but when she checks, she learns that the correct answer is –3. Homework Help ✎
Show Crystal the steps she could take to get –3.
What steps do you think Crystal took to get 3 as a result?
What does she need to consider to avoid making this mistake in the future?
Crystal’s example means that
is not always true for real numbers a and b. What restriction needs to be placed on the numbers a and b?
What is (−3)(−3)?
She needs to convert to imaginary form before completing operations.
They must be non-negative real numbers.