Question

Two students solved the following problem in different ways. Who is correct and why? Explain the mistake made by the student who has the wrong answer.

√-2*√-8=i√2*i√8
=i2√16
=-1*4
=-4
Eddie's answer is -4

√-2*√-8=√16=4
stevie's answer is 4

Answer 1

eddie cause hes a lad

Answer 2

Stevie is wrong. You need to factor out the negative from the radicals before you multiply, just because only positive numbers can be multiplied under radicals.