Examine the function $f(x) = x^2 - 4x$ . For which value(s) of x does $f(x) = 12$ ?
I. 6
II. 4
III. –2

Correct answer marked below

I only

II only

I and II only

I and III only

Correct

I, II and III

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Explanation

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Official Explanation

Official

We are given the function

f(x) = x^2 - 4x

. We need to find the value(s) of x for which

f(x) = 12

. I. 6:

f(6) = 6^2 - 4*6 = 36 - 24 = 12

Correct. II. 4: [m]f(4) = 4^2 - 4*4 = 16 - 16 = 0…

Comments

BaabaFeb 27, 2024

this helped me

HunterJun 15, 2024

thanks

What this question tests

Your ability to evaluate and compose functions, including unusual defined operations.

Applying function operations in the wrong order or ignoring domain restrictions.