Question 252613
Let's take it one part at a time. YOu were given the following equation:
{{{sqrt(x + 3) = 81}}} 
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1)What is the value of x+3?
We square both sides to get
x + 3 = 81^2
or
x + 3 = 6561
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2)What is the value of x?
subtract 3 from both sides to get
x = 6558
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3)What is the value of 3*sqrt x+3?
we already know, sqrt(x+3) = 81, so,
3*sqrt(x+3) = 3*81 = 243.