Question

va rooog,nu stiu nimic :(((​

Answer 1

Răspuns:

a=9

la celelante nush....

Answer 2

Răspuns:

Explicație pas cu pas:

x^2 = 81

x1 = 9; x2 = -9

__________

x^2 = 24

x1 = 2√6

x2 = -2√6

_____________

1,3(8) = (138 - 13)/90 = 125/90 = 25/18

x1 = √25/18 = 5/√18 = 5/3√2 = 5√2/6

x2 = -5√2/6

_____________

(x - 5)^2 = 64

x - 5 = 8; x = 8 + 5 = 13

x - 5 = -8; x = -8 + 5 = -3

_____________

x^2 = 2^26 + 2^29 + 2^30

x^2 = 2^26*(1 + 2^3 + 2^4) = 2^26*(1 + 8 + 16) = 25*2^26 = (5*2^13)^2

x1 = 5*2^13

x2 = -5*2^13