Tìm x biết \( 2x^2 - \frac{25}{2} = 0 \)

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Bài 2. Tìm x

a) \( 2x^2 - \frac{25}{2} = 0 \)

b) \( 3\sqrt{x} - 5 = 0 \)

c) \( \frac{x-1}{3} = \frac{x+1}{4} \)

d) \( \frac{x-1}{3} = \frac{12}{x-1} \) (với \( x \neq 1 \))

e) \( 3|2x + 4| - \frac{4}{3} = -2 \)

f) \( \left( \frac{1}{2} \right)^x + \left( \frac{1}{2} \right)^{x+1} = \frac{3}{8} \)