172 . \(x^2\) - \(7^9\) : \(98^3\) = \(2^{-3}\)
172 . \(x^2\) - \(7^9\) : \(98^3\) = \(\frac{1}{8}\)
172 . \(x^2\) - 42,875 = \(\frac{1}{8}\)
172 . \(x^2\) = \(\frac{1}{8}\) + 42,875 = 43
\(x^2\) = 43 : 172 = \(\frac{1}{4}\)
=> \(x^2\) = \(\frac{1}{4}\)
TH1 : x = \(\frac{1}{2}\)
TH2 : x = \(-\frac{1}{2}\)
Chúc bạn học có hiệu quả!