document.write( "Question 634990: Let f(x)=x^2-1, evaluate the following
\n" ); document.write( "f(a)−3 \n" ); document.write( "

Algebra.Com's Answer #400039 by jsmallt9(3759) $\"\"$ $\"About$

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$\"f%28x%29=x%5E2-1\"$
\n" ); document.write( "This tells us that the function named \"f\" takes whatever input you give it (here represented by \"x\") and squares it and then subtracts 1. This function f will square any input and then subtract 1.

\n" ); document.write( "f(a) is what you get from f when you give it an input of \"a\". And what does f do to its input? Answer: It squares it and then subtracts 1. So:
\n" ); document.write( " $\"f%28a%29+=+a%5E2-1\"$

\n" ); document.write( "For f(a)-3 we just take f(a) and then subtract 3:
\n" ); document.write( " $\"f%28a%29+-+3+=+%28a%5E2-1%29+-+3+=++a%5E2+-+4\"$ \n" ); document.write( "

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