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E urgent, dau coroană..!!!​

E Urgent Dau Coroană class=

Răspuns :

Răspuns:

3.

a). x^2=25

x=±✓25

x=±5

b). x^2=49

x=±✓49

x=±7

c). x^2=144

x=±✓144

x= ±12

d). 2x^2=200

x^2=200/2

x^2=100

x=±✓100

x=±10

e). x^2+1=82

x^2=82-1

x^2=81

x=±✓81

x=±9

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