Given the function f(x) = 6|x – 2| + 3, for what values of x is f(x) = 39?
Answer
A
x = –8, x = 4
B
x = 8, x = –4
C
x = 9, x = –4
D
x = 8, x = –10
Explanation
Set the function equal to 39: 6|x − 2| + 3 = 39. Subtract 3 and divide by 6 to get |x − 2| = 6, so x − 2 = 6 or x − 2 = −6. Thus x = 8 or x = −4, which is choice B.
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