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21 July, 18:23

Shannon says the two expressions below are equivalent. Is she correct? Explain why or why not?

2 (3a-2) + 4a and 10a-2

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  1. 21 July, 18:52
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    Hi there! Shannon is incorrect.

    To find out whether she is correct, we must get rid of the parentheses.

    2 (3a - 2) + 4a =

    2 * 3a - 2 * 2 + 4a =

    6a - 4 + 4a =

    10a - 4

    Shannon says 2 (3a-2) + 4a and 10a-2 are equivalent, but when we work out the parentheses we can see a different outcome. Therefore, Shannon is incorrect.
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