SOLUTION: little unsure about even root property 3x^2 -5=16

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Question 185115: little unsure about even root property
3x^2 -5=16
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!

3x%5E2-5=16 Start with the given equation.


3x%5E2=16%2B5Add 5 to both sides.


3x%5E2=21 Combine like terms.


x%5E2=%2821%29%2F%283%29 Divide both sides by 3.


x%5E2=7 Reduce.


x=0%2B-sqrt%287%29 Take the square root of both sides.


x=sqrt%287%29 or x=-sqrt%287%29 Break up the "plus/minus" to form two equations.



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Answer:


So the solutions are x=sqrt%287%29 or x=-sqrt%287%29 .