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9 March, 11:56

Evaluate 2x^3 + 5x^2 + 4x + 8 when x = - 2

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  1. 9 March, 12:18
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    4

    Step-by-step explanation:

    Given the function 2x³ + 5x² + 4x + 8. In order to evaluate the value of the function at x = - 2 we will substitute the value of x given into the function as shown;

    F (x) = 2x³ + 5x² + 4x + 8

    at x = - 2

    f (-2) = 2 (-2) ³ + 5 (-2) ² + 4 (-2) + 8

    f (-2) = 2 (-8) + 5 (4) + (-8) + 8

    f (-2) = - 16+20-8+8

    f (-2) = - 16+20

    f (-2) = 4

    The value of the function when x = - 2 is 4
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