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Ac8632922
a fost răspuns

rezolvati in R ecuatia |2x-8|=20

Răspuns :

2x-8=20
2x=20+8
x=28/2
x=14

2x-8=-20
2x=-20+8
2x=-12
x=-12/2
x=-6
S={-6,14}
Danamocanu71
2x-8=20 sau 2x-8=-20;
2x-8=20⇒2x=28⇒x=14;
2x-8=-20⇒2x=-12⇒x=-6;
x∈R⇒x=(-6;14);

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