document.write( "Question 348603: f(x)=3x^2+2x+5, Evaluate f(3) and f(-5). \n" ); document.write( "

Algebra.Com's Answer #249212 by Edwin McCravy(20056) $\"\"$ $\"About$

You can put this solution on YOUR website!
f(x)=3x^2+2x+5, Evaluate f(3) and f(-5).
\n" ); document.write( "

\r\n" );
document.write( "Just substitute 3 for x and simplify:\r\n" );
document.write( "\r\n" );
document.write( "f(3)=3(3)^2+2(3)+5\r\n" );
document.write( "\r\n" );
document.write( "f(3)=3(9)+6+5\r\n" );
document.write( "\r\n" );
document.write( "f(3)=27+6+5\r\n" );
document.write( "\r\n" );
document.write( "f(3)=38\r\n" );
document.write( "\r\n" );
document.write( "------\r\n" );
document.write( "\r\n" );
document.write( "Just substitute -5 for x and simplify:\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "f(-5)=3(-5)^2+2(-5)+5\r\n" );
document.write( "\r\n" );
document.write( "f(-5)=3(25)+(-10)+5\r\n" );
document.write( "\r\n" );
document.write( "f(-5)=75-10+5\r\n" );
document.write( "\r\n" );
document.write( "f(-5)=70\r\n" );
document.write( "\r\n" );
document.write( "That's all there is to it!\r\n" );
document.write( "\r\n" );
document.write( "Edwin

\n" ); document.write( "

\n" );