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14 December, 14:12

Ok, Find the difference.

(6x3 + 18x2) - 3x2 =

A. 21x2B. 21x3C. 3x3 + 15x2D. 6x3 + 15x2

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Answers (1)
  1. 14 December, 15:35
    0
    (6x3 + 18x2) - 3x2 =

    6x3 + (18x2 - 3x2) =

    6x3 + 15x2

    The correct answer is D. 6x3 + 15x2. This is so because you can only subtract numbers which have the same power, such as 18x2 and 3x2 in this case. 6x3 stays the same.
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