Posted by Sébastien on .
Hello I need help for derivative this function:
( x²  3x + 2) / ( x² + x + 4 )
Thanks for your help .

Math 
Steve,
just plug in the good old quotient rule:
[(2x3)(x^2+x+4)  (x^23x+2)[(2x+1)]/(x^2+x+4)^2
= 2(2x^2+2x7)/(x^2+x+4)^2