Question 652351: square root of -15 multiplied by square root of -3 divided by square root of 5
Answer by Shana-D77(132)   (Show Source):
You can put this solution on YOUR website! square root of a negative, as you know, is not real. BUT, if you multiply a negative square root by another negative square root, you get a positive! So,
(sqrt -15)(sqrt -3) = sqrt 45
sqrt 45 simplifies to sqrt 9 * sqrt 5
sqrt 9 = 3 so,
sqrt 45 = 3 sqrt 5
(3 sqrt 5)/(sqrt 5) = 3
Answer = 3
|
|
|
