Question

va rog! dau coroana! ​

Answer 1

Răspuns:x^2 inseamna x la putearea 2 ca sa stii ce scriu

iar+- inseamna plus minus adica are 2 raspunsuri

Explicație pas cu pas:

a) x^2=radical(256)

x^2=16

x=+4 x=-4 adica x = cu + - 4

d)x^2=1.44

1.44=36/25

x^2=36/25

x=+-(6/5)

g)x^2=1/4

x=+-1/2

b)x^2=radical din 81

x^2=9

x=+-3

e)x^2=2.56

2.56=64/25

x^2=64/25

x=+-8/5

h)x^2=49/81

x=+-7/9

c)x^2=radical din 625

x^2=25

x=+-5

2x^2=1.62

1.62=81/50

2x^2=81/50

x^2=81/25

x=+-9/5

i)x^2=324/49

x=+-18/7