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How do you find the x- coordinates of the turning points of y equals x3-2x2-5x plus 6?
Wiki User
∙ 12y ago
Differentiate the function with respect to x:
d/dx (x3 - 2x2 - 5x + 6) = 3x2 - 4x - 5
Set this derivative = 0 and solve.
3x2 - 4x - 5 = 0 implies that x = -0.7863 or 2.1196 (to 4 dp)
Wiki User
∙ 12y ago
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