24-04-2021
Mathematics

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If f(x) = -2x2 + x-5, what is f(3)?

If fx 2x2 x5 what is f3 class=

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altavistard altavistard

25-04-2021

Answer:

f(3) = -20

Step-by-step explanation:

Replace each instance of x in 3^2x -9 =0 with 3:

f(x) = -2x2 + x-5 = f(x) = -2x^2 + x-5 (" ^ " represents "exponentiation")

f(3) = -2(3)^2 + 3 - 5

f(3) = - 18 - 2 = -20

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