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x+x patrat=12!Va rog,urgent!Cum se rezolva?

Răspuns :

2Xpatrat =12
4X la a 2 =12
X la a 2=12:4
X la 2= 3
2Xpatrat =12
4X la a 2 =12
X la a 2=12:4
X la 2= 3