Answer:
The expression is zero as numerator is zero.
Explanation:
Given : Expression
.
To find : Which is one reason why this expression is equal to 0 ?
Solution :
In the expression
The numerator value is
Using property of addition and subtraction,
If we add negative term and positive term with same value always became zero.
So,
As numerator is zero dividing by denominator always became zero.
Therefore, the expression became zero.