Question

Am nevoie de ajutor cat mai repede la exercitiul atasat mai jos! Multumesc!

Answer 1

Răspuns:

Explicație pas cu pas:

a. 5 x² = 320

x²=320/5

x²=64

x=radical 64

x=8

b. 4/3 *x²=16/27

x²=16/27/4/3

x²=16/27*3/4

x²=4/9

x=radical4/9

x=2/3

c. (x-1)² = 2,(7)

(x-1)² = (27-2)/9

(x-1)² =25/9

x-1= radical 25/9

x-1 = 5/3

x=5/3+1

x= 5/3+3/3

x=8/3

d. x/20=45/x

20*45=x²

900=x²

x= radical 900

x=30

e. 21/8x = 3x/14

21*14=24x²

294=24x²

x²=294/24

x²=147/12

x= radical 147/12

f. 2m-1/3=27/2m-1

(2m-1)²=27*3

(2m-1)²=81

2m-1 = radical 81

2m-1 = 9

2m=9+1

2m=10

m=5