SOLUTION: Can you help me solve this problem?: Find the domain of f(x)=sqrt(x^2+x-12)

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Question 433954: Can you help me solve this problem?:
Find the domain of f(x)=sqrt(x^2+x-12)
Found 2 solutions by robertb, Gogonati:
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
f%28x%29=sqrt%28x%5E2%2Bx-12%29+=+sqrt%28%28x%2B4%29%28x-3%29%29
==> %28x%2B4%29%28x-3%29%3E=+0
Hence the domain is (-infinity, -4] U [3, infinity).

Answer by Gogonati(855) About Me  (Show Source):
You can put this solution on YOUR website!
the function f%28x%29=sqrt%28x%5E2%2Bx-12%29 is defined if x%5E2%2Bx-12%3E=0, or
%28x-3%29%2A%28x%2B4%29%3E=0, and the domain of f(x) are the intervals:
(-infinity, -3] joint with [4, infinity).