Question

the completion of [x] = 4 is
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Answer 1

Explanation with steps :

=> | x | = 4

=> x² = 4²

=> x² - 4² = 0

=> (x + 4). (x - 4) = 0

=> x - 4 = 0

=> x = 4

x + 4 = 0

x = -4

So, x = -4 or x = 4