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Help pleaseeeeeeeeeeeeeeee

Help pleaseeeeeeeeeeeeeeee-example-1
User Vitaly Fadeev
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1 Answer

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8 votes

Answer:

(b) f(2) = 28

(c) f(-2) = -20

Explanation:

f(2) = -2^3 + 7 x 2^2 - 2 x 2 + 12 f(-2) = -2^3 + 7 x -2^2 - 2 x -2 + 12


1. Calculate Exponents


-2^3 = -8 -2^3 = -8

2^2 = 4 -2^2 = -4

-8 + 7 x 4 - 2 x 2 + 12 -8 + 7 x -4 - 2 x -2 + 12


2. Multiply (left to right)


7 x 4 = 28 7 x -4 = -28

2 x 2 = 4 2 x -2 = -4

-8 + 28 - 4 + 12 -8 - 28 - (-4) + 12


3. Add (left to right)


-8 + 28 = 20 -8 + -28 = -36

20 - 4 = 16 -36 - (-4)= -32

16 + 12 = 28 -32 + 12 = -20

User Plinth
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