Question

rezolvați in R ecuațiile ×-2V5=V5 si (x+5)2=16​

Answer 1

Răspuns:

x-2√5=√5

x=√5+2√5

x=3√5 apartine R

(x+5)*2=16

2x+10=16

2x=16-10

2x=6

x=6/2

x=3 apartine R

Answer 2

x - 2√5 = √5

x = √5 + 2√5  ⇒ x = 3√5

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( x + 5 ) · 2 = 16

2x + 10 = 16

2x = 16 - 10

2x = 6 ⇒ x = 3