Ffactor
a\left(x-7y\right)\left(x+7y\right)
Enrhifo
a\left(x^{2}-49y^{2}\right)
Rhannu
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a\left(x^{2}-49y^{2}\right)
Ffactora allan a.
\left(x-7y\right)\left(x+7y\right)
Ystyriwch x^{2}-49y^{2}. Ailysgrifennwch x^{2}-49y^{2} fel x^{2}-\left(7y\right)^{2}. Gellir ffactorio’r gwahaniaeth rhwng sgwariau gan ddefnyddio’r rheol: p^{2}-q^{2}=\left(p-q\right)\left(p+q\right).
a\left(x-7y\right)\left(x+7y\right)
Ailysgrifennwch y mynegiad cyfan wedi'i ffactorio.
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