Question

........vă rog...........​

Answer 1

Răspuns:

Explicație pas cu pas:

b)

5/√2 = 5√2/2

5/√2 - 3√2/4 = 5√2/2 - 3√2/4 = 10√2/4 - 3√2/4 = 7√2/4

_________

12√2/6 = 2√2

18/3√2 = 6/√2 = 6√2/2 = 3√2

2√2 + 3√2 = 5√2

_________

7√2/4 - 5√2 = 7√2/4 - 20√2/4 = -13√2/4

d)

12/√10 + 20/2√10 = 12/√10 + 10/√10 = 22/√10 = 22√10/10 = 11√10/5

11√10/5 + √40/5 = 11√10/5 + 2√10/5 = 13√10/5

________

6/√90 = 6/3√10 = 2/√10 = 2√10/10 = √10/5

3/2√10 = 3√10/20

√10/5 -+ 5√10/2 - 3√10/20 = 4√10/20 + 50√10/20 - 3√10/20 = 51√10/20

__________

√10/5 - 51√10/20 = 4√10/20 - 51√10/20 = -47√10/20