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Rezolvati in Z ecuatia:
a) √(x-3)²=7


Răspuns :

√(x-3)²=7⇔x-3=7⇔x=7+3⇔x=10
(√7²=7)
| x - 3 | = 7
 
x-3=7  x=10
sau
x-3=-7  x=-4