SOLUTION: Please help> Perform the indicated operations. Simplify the answer square root -7 x square root -7 thanks

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Question 316751: Please help>
Perform the indicated operations. Simplify the answer
square root -7 x square root -7
thanks
Found 2 solutions by jim_thompson5910, Fombitz:
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!



Note: i=sqrt%28-1%29 and i%5E2=-1


So sqrt%28-7%29%2Asqrt%28-7%29=-7

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A Common mistake is this...

sqrt%28-7%29%2Asqrt%28-7%29=sqrt%28%28-7%29%2A%28-7%29%29=sqrt%2849%29=sqrt%287%5E2%29=7 which is NOT the correct answer.

Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Can you use parentheses to show the argument of the square root?
Examples
sqrt(-100u)*sqrt(25y)=sqrt%28-100u%29%2Asqrt%2825y%29