Datrys 100y^2-4y^4

$$100 y ^ { 2 } - 4 y ^ { 4 }$$

Ffactor

$$4\left(-y-5\right)\left(y-5\right)y^{2}$$

Camau Ateb

Ffactora allan 4.

$$4\left(25y^{2}-y^{4}\right)$$

Ystyriwch 25y^{2}-y^{4}. Ffactora allan y^{2}.

$$y^{2}\left(25-y^{2}\right)$$

Ystyriwch 25-y^{2}. Ailysgrifennwch 25-y^{2} fel 5^{2}-y^{2}. Gellir ffactorio’r gwahaniaeth rhwng sgwariau gan ddefnyddio’r rheol: a^{2}-b^{2}=\left(a-b\right)\left(a+b\right).

$$\left(5-y\right)\left(5+y\right)$$

Aildrefnu'r termau.

$$\left(-y+5\right)\left(y+5\right)$$

Ailysgrifennwch y mynegiad cyfan wedi'i ffactorio.

$$4y^{2}\left(-y+5\right)\left(y+5\right)$$

Enrhifo

$$100y^{2}-4y^{4}$$