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5 April, 19:36

1. Choose the correct simplification of the expression - 5x2 (4x - 6x2 - 3).

30x4 - 20x3 + 15x2

-11x4 - x3 - 8x2

-30x4 + 20x3 - 15x2

30x4 + 20x3 + 15x2

2. Simplify (6x2 - 3 + 5x3) - (4x3 - 2x2 - 16).

2x3 - x2 + 21

-2x3 + x2 - 21

x3 + 8x2 + 13

-x3 - 8x2 + 13

+4
Answers (1)
  1. 5 April, 20:17
    0
    1) 30x4 - 20x3 + 15x2

    This is the answer to 1. Don't forget to rearrange the terms in ascending order. That can trip people up.

    2) x3 + 8x2 + 13

    Don't forget to check the terms sign. The subtraction symbol switches them all.
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Home » Mathematics » 1. Choose the correct simplification of the expression - 5x2 (4x - 6x2 - 3). 30x4 - 20x3 + 15x2 -11x4 - x3 - 8x2 -30x4 + 20x3 - 15x2 30x4 + 20x3 + 15x2 2. Simplify (6x2 - 3 + 5x3) - (4x3 - 2x2 - 16).
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