Question

Evaluate the expression |2x – 5| for x = –3 and for x = 3.

A) 
11, 1

B) 
3, 13

C) 
13, 3

D) 
1, 11

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Answer 1

Option A: 11,1 is the correct answer.

Explanation:

The absolute value is used in the given expressions.

The absolute value represents the values of a number or variable irrespective of its sign. This means that |x| = x and |-x| = 0

Given expression is:

`|2x-5|`

Putting x=3

`|2(-3)-5| \\= |-6-5|\\= |-11|\\=11`

Putting x=-3

`|2(3)-5| \\= |6-5|\\= |1|\\=1`

Hence,

Option A: 11,1 is the correct answer.