Question

Select all expressions equivalent to 15i.
square root of -15
15 square root of -1
square root of-225
225 square root of -1

Answer 1

ok so like i said said
\[i=\sqrt{-1}\]
so what your answer should be

Answer 2

square root of -15
and 15 square root of- 1

Answer 3

second one right

Answer 4

this doesn't look good right ???