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26 January, 10:11

A student expanded an expression, as shown. Is the student's work correct? Explain why or why not.

-6 (4x - 2 / 13)

-6 (4x) + 6 ( - 2/13)

-24x - 12/13

+3
Answers (2)
  1. 26 January, 10:14
    0
    No, the work is not correct. The distributive property was not used properly to expand the expression. Negative 6 should be multiplied by both terms in the parentheses. The second product should be - 6 times - 2/13 to get positive 12/13.
  2. 26 January, 10:22
    0
    The work is incorrect.

    (-6) multiplies both terms inside parentheses. For some reason, the student changed the sign of that multiplier for the second term. The second term of the result should have a positive sign, the result of multiplying (-6) (-2/13) = + 12/13.
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