Tìm x, biết: a) (x + 4)(x² – 4x + 16) – x(x – 5)(x + 5) = 264; b) (x – 2)³ – (x – 2)(x²²+ 2x + 4) + 6(x – 2)(x + 2) = 60.

Tìm x, biết:

a) (x + 4)(x² – 4x + 16) – x(x – 5)(x + 5) = 264;

b) (x – 2)³ – (x – 2)(x²²+ 2x + 4) + 6(x – 2)(x + 2) = 60.

Tìm x, biết: a) (x + 4)(x2 – 4x + 16) – x(x – 5)(x + 5) = 264; b) (x – 2)3 – (x – 2)(x22 + 2x + 4) + 6(x – 2)(x + 2) = 60.