Is the following UPC valid or invalid 4-63291-48231-4 ? Invalid; d = 1
Valid
Invalid; d = 9
Invalid; d = 3

Invalid d = 3 will be your answer

Answerthe simplified expression isexplanationthe given expression is,let us deal with the bracket first.the two negatives in the parenthesis will become positive.the expression now becomes,we now expand the parenthesis to get,we group like terms to obtain,this simplifies to,

The answer would be c.hope this .