Question

Which of the following expressions is incorrect?

|-12| = 12
-|-12| = -12
-|12| = 12
|12| = 12

Answer 1

Either b or c because A and D are correct

Answer 2

-|12| = 12

Explanation:

Modulus provides the positive value

`\Rightarrow |x| or |-x|=x`

So, Option 1)|-12| = 12

So, it is true

Option 2)-|-12| = -12

-|12|=-12

-12=-12

So, it is true

Option 3) -|12| = 12

-|12|≠12

So, it is false

Option 4)|12| = 12

So, it is true

Hence -|12| = 12 is incorrect.

So. Option C is incorrect.