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11 April, 15:22

Which expression is equal to 7√28-5√63

A:-√7

B:-37√7

C:-11√7

D:√7

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Answers (2)
  1. 11 April, 16:55
    0
    The Answer is A: - √7
  2. 11 April, 19:22
    0
    Sqrt 28 = 2 sqrt7

    and sqrt 63 = 3 sqrt7

    so answer is 14 sqrt7 - 15 sqrt 7

    = - sqrt 7

    Its A
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