Question

Am foarte multe exercitii de rezolva si nu reusesc.
Exercitiul 4.
Multumesc frumos.​

Answer 1

Răspuns:

Explicație pas cu pas:

36/x = x/4

x^2 = 36*4 = (6*2)^2 = 12^2

x = 12 sau x = -12

_________

x^2 = 0,02*8 = 0,16 = 16/100 = (4/10)^2 = (2/5)^2

x = 2/5 sau x = -2/5

_________

x^2 = √3 * √48 = √3*3*16 = 3*4 = 12

x = √12 = 2√3 sau x = -√12 = -2√3

____________

x^2 = 1,21*16 = 19,36 = 1936/100 = 484/25 = (22/5)^2

x = 22/5 sau x = -22/5

____________

x^2 = 9/4 * 1024/81 = 256/9 = (16/3)^2

x = 16/3 sau x = -16/3

__________

x^2 = 64/11 * 275/484 = 16*25/121 = (4*5/11)^2 = (20/11)^2

x = 20/11 sau x = -20/11

____________

x^2 = 2√5 * √125 = 2√5*125 = 2√625 = 2*25

x = 5√2 sau x = -5√2

Answer 2

a) 2x=144

x=72

b)2x=0.16

x=0.08

c)2x=

$\sqrt{ 144}$

2x=12

x=6

d)2x=19.36

x=9.68

e)2x=

$\frac{256}{9}$

x=

$\frac{128}{9}$

sau

x=14.(2)

f)2x=

$\frac{400}{121}$

x=

$\frac{200}{121}$

g)2x=

$2 \sqrt{625}$

2x=2×25

x=25