SOLUTION: Multiply, and simplify if possible. "V" is a square root (V7+8)(V7-4)

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Question 382961: Multiply, and simplify if possible.
"V" is a square root
(V7+8)(V7-4)
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Write sqrt(7), it's easier.
Use the FOIL method,
%28sqrt%287%29%2B8%29%28sqrt%287%29-4%29=7-4%2Asqrt%287%29%2B8%2Asqrt%287%29-32
%28sqrt%287%29%2B8%29%28sqrt%287%29-4%29=highlight%28-25%2B4%2Asqrt%287%29%29