Answer:
Given that we have;
By the application of the law of indices and algebraic process of adding a and subtracting a fraction from a whole number, we have;
Step-by-step explanation:
An identity is a valid or true equation for all variable values
The given equation is presented as follows;
From trigonometric identities, we have;
Yes, parentheses can change the order in which operations are performed in an expression.
Let us understand this with two examples.
First example.
Let us suppose we have to simplify the expression
In this expression we have evaluated subtraction first instead of multiply.
Second example.
Let us suppose we have to simplify the expression
In this expression we have evaluated multiplication first and then subtraction.
Therefore, from above two examples we can see that parentheses can change the order in which operations are performed in an expression.