Help me please !!!!!

I have f(x) = 6x - x^2 - 6sqrt(a+b)

determine: (f(sqrt(a+b) - f(1)) / sqrt(a+b) = ?

Thank you for your help

Question

Help me please !!!!!

I have f(x) = 6x - x^2 - 6sqrt(a+b)

determine: (f(sqrt(a+b) - f(1)) / sqrt(a+b) = ?

Thank you for your help

myininaya · Answer

$$f(\sqrt{a+b})=6\sqrt{a+b}-(\sqrt{a+b})^2-6\sqrt{a+b} $$

myininaya · Answer

simplify this

anonymous · Answer

$$f(x)=6x-x ^{2}-6\sqrt{a+b} $$

anonymous · Answer

but i need to find: $$\frac{ f(\sqrt{a+b})-f(1) }{ \sqrt{a+b}}=?$$

myininaya · Answer

Yes I'm asking you to find that one thing first.

myininaya · Answer

Just simplify what I wrote above and we are going to plug that into your expression that you are trying to evaluate

myininaya · Answer

|dw:1387347305923:dw|
This is our main goal to evaluate 
But right now I'm having you work on the little parts of it first like this circled thing: