SOLUTION: I AM SUPOSED TO USE i for this but the teacher did not explain how x^2=-16 8x^2=-2 x^2=-30 please help thank you for your time

Algebra ->  Complex Numbers Imaginary Numbers Solvers and Lesson -> SOLUTION: I AM SUPOSED TO USE i for this but the teacher did not explain how x^2=-16 8x^2=-2 x^2=-30 please help thank you for your time      Log On


   

Question 24681: I AM SUPOSED TO USE i for this but the teacher did not explain how
x^2=-16
8x^2=-2
x^2=-30
please help
thank you for your time
Answer by Earlsdon(6294) About Me  (Show Source):
You can put this solution on YOUR website!
Your teacher must have explained to you that i (for imaginary) is the symbol used to representsqrt%28-1%29, so:
x%5E2+-+16 Take the square root of both sides.
x = + or - sqrt%28-16%29 Simplify.
x = +or-sqrt%28-1%2A16%29
x = +or-4sqrt%28-1%29
x = +or-4i
The other problems are handled in a similar fashion.