SOLUTION: How do you factor x^4 - 3x^2

SOLUTION: How do you factor x^4 - 3x^2 - 4

Question 20379: How do you factor x^4 - 3x^2 - 4
Answer by longjonsilver(2297) (Show Source): You can put this solution on YOUR website!
a little mental leap is required here.

Let , so that . Are these definitions OK?

Right, then becomes which is a normal quadratic that factorises easily to (y-4)(y+1).

Hence, we have

jon.

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