Parentheses are used in Algebraic / Mathematical expressions primarily to modify the normal order of operations. Therefore in an expression involving parentheses, the terms present inside the parentheses () are evaluated first.
There are some basic parentheses Rules presented below. You must learn them by heart.
`a- (-b) = a+b `
`a * (-b) =-ab`
We present some examples involving Parentheses Rules that will help you understand their significance and the way they are used.