Factorise y4 - 3y^2 - 4. Hint. Let z = y^2

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- Apr 11th 2010, 11:38 PMAJShawFactorise
Factorise y4 - 3y^2 - 4. Hint. Let z = y^2

- Apr 11th 2010, 11:40 PMharish21
- Apr 11th 2010, 11:44 PMAJShaw
I am just learning factorising. Is it:

z^2-3z-4

z^2-3z-4

z-3-4

z-7

If not right, can you show me how to do it please? - Apr 11th 2010, 11:48 PMharish21