Question

Va rog ex din img... Ptr nu i dau de capat ​

Answer 1

Răspuns:

Explicație pas cu pas:

a)

x^2/9 = 16

x^2 = 9*16 = 144

x1 = 12

x2 = -12

_________

x^2/100 - 1/64 = 0

x^2/100 = 1/64

x^2 = 100/64

x1 = 10/8 = 5/4

x2 = -10/8 = -5/4

________________

b)

2x^2 = 3

x^2 = 3/2

x1 = √3/2

x2 = -√3/2

__________

3x^2 = 7

x^2 = 7/3

x1 = √7/3

x2 = -√7/3

___________________

c)

9x^2 - 10 = 0

9x^2 = 10

x^2 = 10/9

x1 = √10/9 = √10/3

x2 = -√10/9 = -√10/3

_________

25x^2 - 32 = 0

25x^2 = 32

x^2 = 32/25

x1 = √32/25 = 4√2/5

x2 = -4√2/5

__________________

d)

4x^2 = 0,5

x^2 = 0,5 : 4 = 0,125

x1 = √0,125

x2 = -√0,125

________

144x^2 = 25

x^2 = 25/144

x1 = √25/144 = 5/12

x2 = -5/12