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21 October, 04:14

Describe and correct the error in finding the difference.

(4m + 9) - 3 (2m - 5) = 4m + 9 - 6m - 15

= 4m - 6m + 9 - 15

= - 2m - 6

+2
Answers (2)
  1. 21 October, 04:54
    0
    1. in the distributive - 3 (2m - 5), one forget to use the positive sign instead of the negative sign.

    2. the answer should be - 2m + 24
  2. 21 October, 07:52
    0
    final answer should be - 2m + 24

    (4m + 9) - 3 (2m - 5) → (distributing gives)

    4m + 9 - 6m + 15 → (error in original has - 15)

    collect like terms

    (4m - 6m) + (9 + 15) = - 2m + 24
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