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marin [14]
4 years ago
5

PLEASE HELP! Given the function f(x) = 3x2 − 4, what is f(-2)?

Mathematics
1 answer:
EleoNora [17]4 years ago
5 0

Answer: Variant C


Step-by-step explanation:

f(x) = 3x^2 − 4

For finding f(-2) just replace x with - 2 like this:

f(-2)=3*((-2))^2-4=3*4-4=12-4=8

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prohojiy [21]

Answer:

D. 3x² + 19x - 14

Step-by-step explanation:

Use FOIL to find the answer.

First: x * 3x = 3x²

Outer: -2 * x = -2x

Inner: 3x * 7 = 21x

Last: 7 * -2 = -14

Form the equation:

3x² - 2x + 21x - 14

Combine like terms.

3x² + 19x - 14

8 0
3 years ago
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vekshin1

Answer:your answer is D:11

Step-by-step explanation:

Just do 11×5.8 on your paper where it says show your work then you add 15

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3 years ago
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lorasvet [3.4K]

Answer:

A. 5x^2 - 2x - 12 = 0

Step-by-step explanation:

The base is x feet.

The height is 2 less that 5 times the base.

The height is 5x - 2.

The area is 12.

The area is base * height / 2.

area = bh/2

area = x * (5x - 2) = 12

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pashok25 [27]

Answer:

Equation 3 is correct.

Step-by-step explanation:

It's the same equation but divided by 2.

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Answer:

5

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