Use synthetic division to find P (-2) for P (x) = x4 + 9x3 - 9x + 2.

Question

Mathematics

Westie

29 April, 07:41

Use synthetic division to find P (-2) for P (x) = x4 + 9x3 - 9x + 2.

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Answers (1)

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Pebbles · Answer 1

P (x) = x^4 + 9x^3 - 9x + 2

Given: P (-2)

plug - 2 in for x and solve

P (-2) = x^4 + 9x^3 - 9x + 2

P (-2) = (-2) ^4 + 9 (-2) ^3 - 9 (-2) + 2

P (-2) = 16 + 9 (-2) ^3 - 9 (-2) + 2

P (-2) = 16 - 72 - 9 (-2) + 2

P (-2) = 16 - 72 + 18 + 2

P (-2) = - 56 + 18 + 2

P (-2) = - 38 + 2

P (-2) = - 36

-36 is the answer