Ffactor
4\left(x-4y^{2}\right)\left(x+4y^{2}\right)
Enrhifo
4\left(x^{2}-16y^{4}\right)
Rhannu
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4\left(x^{2}-16y^{4}\right)
Ffactora allan 4.
\left(x-4y^{2}\right)\left(x+4y^{2}\right)
Ystyriwch x^{2}-16y^{4}. Ailysgrifennwch x^{2}-16y^{4} fel x^{2}-\left(4y^{2}\right)^{2}. Gellir ffactorio’r gwahaniaeth rhwng sgwariau gan ddefnyddio’r rheol: a^{2}-b^{2}=\left(a-b\right)\left(a+b\right).
4\left(x-4y^{2}\right)\left(x+4y^{2}\right)
Ailysgrifennwch y mynegiad cyfan wedi'i ffactorio.
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