Question
Solve:
$ x^4-144 x $
$ x^4-144 x $
✓
Answer
$ x^4-144 x $
$ =x\left(x^2-144\right) $
$ =x\left(x^2-12^2\right) $
$ =x(x-12)(x+12) $
$ =x\left(x^2-144\right) $
$ =x\left(x^2-12^2\right) $
$ =x(x-12)(x+12) $
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