Hello,

I think you have to solve them algebraically ^^'I have substituted the values of x between the stated ranges to get my graph, I can then clearly see where the graph cross the x and Y axis.

That is f(0)=... ? and f(x)=0 --> x=... ?

Solve for x in , that's all it means (when there are several variables, it's another story)I then have to find where the gradiet is zero, This is where my problem lies, I can see on the graph roughly where it will be, however i need the exact answer. All the books and example i have been able to find just show how to find the gradient at a specific point not a specific gradient.

I know that i haveto differentiate to get the gradient, but after that i am a little bit stuck.

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Solve for x in

You can use the discriminant or you can complete the square in order to find the solutions.