Andrew was taking a math quiz. There was a question on the quiz that had the
expression 8x – 9 – 12x + 5. Andrew's teacher told the class there was a typo
and the expression was supposed to have one set of parentheses in it.
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1. Where could you put parentheses in 8x – 9 – 12x + 5 to make a new
expression that is still equivalent to the original expression? How do you know
that your new expression is equivalent?
2.
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Where could you put parentheses in 8x - 9 - 12x + 5 to make a new
expression that is not equivalent to the original expression? List as many
different answers as you can.