Question

$-x-0$ ($x\ne 0$) is equal to?

• A. $x$
• B. $-1\times -x$
• C. $-1\times x$
• D. $0-(-1)\times x$

Answer 1

The correct option is C $-1\times x$

We are given with an algebraic expression $-x-0$. Simplifying this expression:
$-x-0=-x$
The expression $-x-0$ reduces to $-x$.

Option (a.),
As $x\ne -x$.
Option (a.) is not the correct answer.

Option (b.),
$-1\times -x=x$
As $x\ne -x$.
Option (b.) is not the correct answer.

Option (c.)
$-1\times x=-x$
$-x=-x$
Option (c.) is the correct answer.

In option (d.), we have $0-(-1)\times x$.
$=0-(-1)\times x=0-(-1\times x)$
$=0-(-x)=x$
As $x\ne -x$
Option (d.) is not the correct answer.

Therefore, option (c.) is the correct answer.