document.write( "Question 644566: for f(x)=X^2+2x.find f(-1) \n" ); document.write( "
Algebra.Com's Answer #405130 by MathLover1(20849)\"\" \"About 
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\n" ); document.write( "for \"f%28x%29=x%5E2%2B2x\" find \"f%28-1%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"f%28-1%29=%28-1%29%5E2%2B2%28-1%29\"\r
\n" ); document.write( "\n" ); document.write( "\"f%28-1%29=1-2\"\r
\n" ); document.write( "\n" ); document.write( "\"f%28-1%29=-1\"
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