SOLUTION: Expressed in simplest form 2 radical negative 50 times 3 radical negative 8 is equivalent to

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Question 1014800: Expressed in simplest form 2 radical negative 50 times 3 radical negative 8 is equivalent to
Answer by ikleyn(52787) About Me  (Show Source):
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Expressed in simplest form 2 radical negative 50 times 3 radical negative 8 is equivalent to
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2%2Asqrt%28-50%29.3%2Asqrt%28-8%29 = 2%2A3%2Asqrt%28%28-50%29%2A%28-8%29%29 = 6%2Asqrt%28400%29 = +/- +6%2A20 = +/- 120.


Taking the square root in the complex domain is many-valued operation (more exactly, two-valued operation). 
It means that two values of the square root that differ only by sign are equally right.
I marked it by putting the signs +/-.