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Given p(x) = 2x^3 - 3x - 5, what is the value of p(-2)?

A. -33
B. -23
C. -17
D. -7

User Fung
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1 Answer

4 votes

Final answer:

Upon substituting -2 into the polynomial p(x) = 2x^3 - 3x - 5, the result is -20, which is not listed in the provided options. This indicates a possible error in the options given.

Step-by-step explanation:

To find the value of p(-2) for the polynomial p(x) = 2x^3 - 3x - 5, we simply substitute x with -2 in the equation.

p(-2) = 2(-2)^3 - 3(-2) - 5

Calculating each part of the equation step-by-step:


  • (-2)^3 = -8

  • 2(-8) = -16

  • -3(-2) = 6

  • So we have, -16 + 6 - 5 = -15 - 5

  • Which equals -20

Therefore, p(-2) = -20.

None of the provided options A, B, C, or D match the calculated answer. Hence, there seems to be a mistake either in the calculation of the options or in the transcription of the question.

User Inch High
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