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Elenna [48]
3 years ago
6

Given the function f(x)=2|x+6|-4 for what values of x is f(x) =6

Mathematics
2 answers:
tigry1 [53]3 years ago
7 0

Answer:

x= -1 or x= -11

Step-by-step explanation:

Given :  f(x)=2|x+6|-4

To Find : value of x

Solution :

Since we are given that f(x)=6

And f(x)=2|x+6|-4

⇒2|x+6|-4 =6

⇒2|x+6|=6+4

⇒2|x+6|=10

⇒|x+6|=\frac{10}{2}

⇒|x+6|=5

Now absolute mode :  the absolute value or modulus |x| of a real number x is the non-negative value of x without regard to its sign. Namely, |x| = x for a positive x, |x| = −x for a negative x

⇒x+6=5 or x+6= -5

⇒x=5-6 or x= -5-6

⇒x= -1 or x= -11

Thus for x = -1 or x =-11 , f(x) =6


lina2011 [118]3 years ago
5 0
If 6=2|x+6|-4
Then 10=2|x+6|
|x+6|=5
which means x+6=5 OR x+6=-5
so x=-1 OR x=-11
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