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21 October, 05:08

Simplify the expression: r3 x 5r2 x 2r4

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Answers (2)
  1. 21 October, 05:17
    0
    10r^9

    Step-by-step explanation:

    From one of the laws of indices:

    (A²) ² = A ²+² = A⁴

    So then, let's apply the knowledge to solve our questions.

    r³ * 5r² * 2r⁴

    Let's take it one after the other

    = (r³ * 5r²) = 5r^5

    = (r * r * r * 5 * r * r)

    = (5r ^5.) (2r⁴)

    = (5*2) (r^5 * r^4)

    = 10 r ^9
  2. 21 October, 05:22
    0
    10r^9 is your answer. r^3x5r^2 = 5r^5. Take that and multiply it by 2r^4 and you get 10r^9
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