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30 July, 15:32

Solve 4r2 - 16 = 84.

{±4}

{±3}

{±6}

{±5}

+1
Answers (1)
  1. 30 July, 18:35
    0
    4r² - 16 = 84

    4r ² = 84+16

    4r² = 100

    r²=25

    r=√25

    r = ±5
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