pre-algebra

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Find the product: (4k^5)(-2k)^3

Is it -32k^8 or -32k^2

I don't know rather to add or subtract the 5 & 3.

  • pre-algebra -

    The correct answer is -32k^8

    - When you multiply powers with the same base, you keep the base and ADD the exponents.

    - For the second multiplier, note that the both the -2 and the k would be cubed, whereas in the first multiplier only the k get raised to the 5th.

    so you would (4)(k^5)(-2)^3 (k^3)
    = (4)(k^5)(-8)(k^3)
    = -32 k^8

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