Question

rezolvati in multimea numerelor reale ecuatia radical din 2x-1=3

Answer 1

√(2x-1)=3
2x-1=9
2x=10
x=5

Answer 2

√[2x-1]=3
⇒2x-1=3²=9
⇒2x=10⇒x=5∈R;