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28 December, 13:49

Which choice represents the solution for x2 = 676?

A) x =

16

B) x =

676

C) x = ±

16

D) x = ±

676

+4
Answers (1)
  1. 28 December, 14:03
    0
    x = ±26

    Step-by-step explanation:

    676:2=338

    338:2=169

    169:13=13

    13:13=1

    then 676 = 2²*13² = 26²

    then x² = 676 ⇔ x² = 26² ⇔ (x-26) (x+26) = 0 ⇔ x = 26 or x = - 26
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