Question

Rezolvați in R ecuațiile.

Answer 1

Răspuns:

Salut

a)√x=3√7

x=9•7

x=63

√63=3√7

x=63.

b)√x²=4

|x|=4

x=4

x=-4

x1=-4;x2=4.

c)x²=27

x=3√3

x=-3√3

x1=-3√3; x2=3√3.

d)(2x+1)²=25

2x+1=±5

2x+1=5

2x+1=-5

x=2

x=-3

x1=-3; x2=2.

==evergreen==