Exercise 54 Page 317

Parentheses are added to mathematical expressions solely for clarity and therefore can easily be removed. To simplify the given expression, we will remove the parentheses and then combine like terms.

$(2y^3-3y+8)+(3y^2-6y)$

RemovePar

Remove parentheses

$2y^3-3y+8+3y^2-6y$

AddSubTerms

Add and subtract terms

$5y^2-9y+8$

Because none of our remaining terms have matching variables, there are no more like terms and our expression cannot be simplified any further.