find the critical points of root3(x^2-7x-30)?

  • Thread starter Thread starter Austin E
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A

Austin E

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My f'(x)= [1/((x^2-7x-30)^2)]*[3(x^2-7x-30)^2 * (2x-7)

Which I factored to-

=[1/((x^2-7x-30)^2)] * [3(x-10)(x+3)] * (2x-7)

So I know the answers then are; -3,10 and 7/2. But why isn't one of them 0?
 
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