A.X3 - 16X = 0X(X2 - 16) = 0X(X - 4)(X + 4) = 0SUY RA X = 0, X = 4, X...

Câu 2:a.x

³

- 16x = 0x(x

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- 16) = 0x(x - 4)(x + 4) = 0Suy ra x = 0, x = 4, x = -4b.(2x + 1)

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- (x - 1)

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= 0(2x + 1 - x + 1)(2x + 1 + x - 1) = 0(x + 2)(3x) = 0Suy ra x = 0 hoặc x = -2