SOLUTION: how do you solve √v-4 = 3 i know that the answer is 13.. but i don't understand how. i keep on getting -2.5/4

Algebra ->  Algebra  -> Radicals -> SOLUTION: how do you solve √v-4 = 3 i know that the answer is 13.. but i don't understand how. i keep on getting -2.5/4      Log On

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Question 146249: how do you solve √v-4 = 3
i know that the answer is 13.. but i don't understand how.
i keep on getting -2.5/4
Answer by jim_thompson5910(21667) About Me  (Show Source):
You can put this solution on YOUR website!
sqrt%28v-4%29=3 Start with the given equation.


v-4=3%5E2 Square both sides. This will eliminate the square root.


v-4=9 Square 3 to get 9


v=9%2B4 Add 4 to both sides.


v=13 Combine like terms on the right side.


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Answer:

So the answer is v=13