Tìm x a, \((x^2 - 1)^3 \cdot (1 - x^2)^2 = 8\) b, \(3x^4 \cdot (-x^2) - 5x^3 \cdot x^2 + x \cdot \left(\frac{1}{2x}\right) = 0\)

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Bài 2 : Tìm x
a, \((x^2 - 1)^3 \cdot (1 - x^2)^2 = 8\)
b, \(3x^4 \cdot (-x^2) - 5x^3 \cdot x^2 + x \cdot \left(\frac{1}{2x}\right) = 0\)