document.write( "Question 670510: If f(x)=x^2-5, find and simplify f(x+h)-f(x)/h \n" ); document.write( "
\n" ); document.write( "Hi,\n" ); document.write( "f(x)=x^2-5\n" ); document.write( "f(x+h)-f(x)/h = (x+h)^2 - 5 - (x^2-5) = h(2x+h)/h = 2x+h