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# math

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Given f(x)=squarerootof(x−3)f(x)=squarerootof(x−3), what is f(12)f(12)?

Jul 24, 2018

#1
+2343
+1

If $$f(x)=\sqrt{x-3}$$, then, in order to evaluate $$f(12)$$, replace all instances of x with 12.

 $$f(x)=\sqrt{x-3}$$ This is the original definition of the function. $$f(12)=\sqrt{12-3}$$ Simplify. $$f(12)=\sqrt{9}$$ $$f(12)=3$$
Jul 24, 2018

#1
+2343
+1
If $$f(x)=\sqrt{x-3}$$, then, in order to evaluate $$f(12)$$, replace all instances of x with 12.
 $$f(x)=\sqrt{x-3}$$ This is the original definition of the function. $$f(12)=\sqrt{12-3}$$ Simplify. $$f(12)=\sqrt{9}$$ $$f(12)=3$$