# Calculus

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Find the x-coordinates of all points on the graph of y=x^3 - 4x^2 + 5x at which the tangent line is horizontal.

• Calculus -

Translate to math talk: find when dy/dx is zero.

y'=3x^2-8x+5=0
0=(3x-5)(x-1)

I assume you can do it from here.

• Calculus -

Thanks

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