Question

[nguyen tien hai]

Tìm x:

172 * x^2 - 7^9 : 98^3= 2^-3

Answer 1

[Cold Wind]

172 * x^2 - 7^9 : 98^3= 2^-3

172 x^2 - (343/98)^3 = 2^-3

172 x^2 -  (7/2)^3 = 2^-3

172 x^2 = 1/8 + (7/2)^3

172x^2 = 43

x^2 = 1/4

x= +-1/2