Question

If a = 3 and b = -i, then find the value of the ab² in fully simplified form.

Answer 1

`ab^2=3`

`(ab)^2=-9`

Explanation:

You don't give parentheses, so pick the most appropriate answer:

`ab^2=3(-i)^2=3(-i)(-i)=3(-(-1))=3`

`(ab)^2=(3(-i))^2=(-3i)^2=9i^2=9(-1)=-9`