Tuesday

July 29, 2014

July 29, 2014

Posted by **Hannah** on Tuesday, February 22, 2011 at 9:06pm.

y= 3x^2+8 / x^2+3

(x^2+3)(6x) - (3x^2+8)(2x) all over (x^2+3)^2

The answer is 2x/(x^2+3)^2

The only problem is I am not sure how they simplified this to get the answer.

- math -
**Reiny**, Tuesday, February 22, 2011 at 9:14pmJust expand and simplify your numerator.

[(x^2+3)(6x) - (3x^2+8)(2x)] / (x^2+3)^2

= (6x^3 + 18x - 6x^3 - 16x)/(x^2+3)^2

= 2x/(x^2+3)^2

**Related Questions**

MoRe HeLp PlEaSe!! (calc) - Also can I get some help with this LONG, TIRESOME ...

calculus - Please help. Applying the chain rule, how do I find the derivative of...

Calculus - How do I use the chain rule to find the derivative of square root(1-x...

Math, Calculus - Find the derivative of the function. y= xcosx - sinx What's the...

calculus pleas pleas help, derivates - what is the derivative of x/tan(x) and ...

limit calc question - 2 questions!!! 1. Limit X approaching A (X^1/3-a^1/3)/ x-a...

Calculus - Explain the global optimization process for a continuous function ...

Calculus - Explain the global optimization process for a continuous function ...

Calc - a) y =ln(x-1) find dy/dx=? b) y=3 ln x - ln (1/x) where x >0, dy/dx...

Calculus (Global Max) - Explain the global optimization process for a continuous...