document.write( "Question 508898: Let f(x)=x^2-4 and g(x)=-5X+3\r
\n" ); document.write( "\n" ); document.write( "f(x)= -3x^2+ -4, g(x)=x3+3X^2 \n" ); document.write( "
Algebra.Com's Answer #341165 by oberobic(2304)\"\" \"About 
You can put this solution on YOUR website!
OK. But what do you want to do with them?
\n" ); document.write( "(f + g)x?
\n" ); document.write( "(f - g)x?
\n" ); document.write( "(f * g)x?
\n" ); document.write( "(f / g)x?
\n" ); document.write( "(f o g)x?
\n" ); document.write( ".
\n" ); document.write( "f(x) = x^2 -4
\n" ); document.write( "f(x) = (x-2)(x+2)
\n" ); document.write( ".
\n" ); document.write( "g(x) = 5x + 3
\n" ); document.write( ".
\n" ); document.write( "You can graph them. f(x) is red; g(x) is green.
\n" ); document.write( ".
\n" ); document.write( "\"graph%28500%2C500%2C-50%2C50%2C-50%2C50%2Cx%5E2-4%2C5%2Ax%2B3%29\"
\n" ); document.write( ".
\n" ); document.write( "OR you can set them = to each other.
\n" ); document.write( ".
\n" ); document.write( "f(x) = g(x)
\n" ); document.write( ".
\n" ); document.write( "x^2-4 = 5x + 3
\n" ); document.write( "subtract 5x from both sides
\n" ); document.write( "x^2 -5x -4 = 3
\n" ); document.write( "subtract 3 from both sides
\n" ); document.write( "x^2 -5x -7 = 0
\n" ); document.write( "Which can only be solved using the quadratic equation.
\n" ); document.write( "But you can graph it.
\n" ); document.write( ".
\n" ); document.write( "\"graph%28500%2C500%2C-20%2C20%2C-20%2C20%2Cx%5E2-5%2Ax-7%29\"
\n" ); document.write( ".
\n" ); document.write( "OR you can add them.
\n" ); document.write( ".
\n" ); document.write( "f(x) + g(x) = (f+g)x
\n" ); document.write( ".
\n" ); document.write( "f(x) = x^2 -4
\n" ); document.write( "g(x) = 5x + 3
\n" ); document.write( ".
\n" ); document.write( "(f+g)x = x^2 +5x -7
\n" ); document.write( ".
\n" ); document.write( "So, you need to re-read the question to see what they're asking you do with f(x) and g(x).
\n" ); document.write( " \n" ); document.write( "
\n" );