Question

1 si 2, va rog!!!
Cat mai repede

Answer 1

1. a) x=V9= 3 sau -3

b) x²=3=V3

c) x-2=V25

x-2=5

x=7

d) x= -V9 = -3

e) x²=18/2

x²=9 => x= V9= -3 sau 3

f) x²=17

x=V17

g) x²-9=0

x²=9

x=3 sau -3

h) 2x+1=V27

2x+1=3V3

2x=3V3-1

x=(3V3-1)/2

i) 2x-3=V81

2x-3=9

2x=12

x=6

j) (2x-1)²= -49

2x-1= -V49

2x-1= -7

2x= -6

x= -3

2 A a) x=V9=3 sau -3

b) x²=9 => x= 3 sau -3

c) x-1=V4

x-1=2

x=3

d) 2x+1=V49

2x+1=7

2x=6

x=3

B a) x=V4 =2 sau -2

b) x²=4

x=V4 = 2 sau -2

c) x-1=V9

x-1=3

x=4

d) 2x-1=5

2x=6

x=3