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8 July, 03:20

Write an equation for the cubic polynomial function whose graph has zeroes at 2, 3, and 5. Write the polynomial function for the graph. f (x) = (x - 2) (x - 3) (x - 5) Simplify the right side. What is the equation?

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  1. 8 July, 03:24
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    f (x) = (x - 2) (x - 3) (x - 5)

    f (x) = x³ - 10x² + 31x - 30

    Step-by-step explanation:

    We have to write the equation for the cubic polynomial function whose graph has zeroes at 2, 3, and 5.

    That means at x = 2, x = 3 and at x = 5 the function f (x) will become zero.

    Therefore, (x - 2), (x - 3) and (x - 5) are the factors of the function f (x).

    Ans the cubic function is f (x) = (x - 2) (x - 3) (x - 5) ... (1) (Answer)

    Now, we have to simplify the right hand side of the equation (1).

    Hence, f (x) = (x - 2) (x² - 8x + 15)

    ⇒ f (x) = x³ - 8x² + 15x - 2x² + 16x - 30

    ⇒ f (x) = x³ - 10x² + 31x - 30

    So, this is the requires equation. (Answer)
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