Datrys (-x^2/4+2y^2)=

$$( - \frac { x ^ { 2 } } { 4 } + 2 y ^ { 2 } ) =$$

Enrhifo

$$-\frac{x^{2}}{4}+2y^{2}$$

Camau Ateb Byr

I ychwanegu neu dynnu mynegiannau, rhaid i chi eu ehangu i wneud eu enwaduron yr un fath. Lluoswch 2y^{2} â \frac{4}{4}.

$$-\frac{x^{2}}{4}+\frac{4\times 2y^{2}}{4}$$

Gan fod gan -\frac{x^{2}}{4} a \frac{4\times 2y^{2}}{4} yr un dynodydd, adiwch nhw drwy adio eu rhifiaduron.

$$\frac{-x^{2}+4\times 2y^{2}}{4}$$

Gwnewch y gwaith lluosi yn -x^{2}+4\times 2y^{2}.

$$\frac{-x^{2}+8y^{2}}{4}$$

Ffactor

$$\frac{8y^{2}-x^{2}}{4}$$

Camau Ateb

Ffactora allan \frac{1}{4}.

$$\frac{-x^{2}+8y^{2}}{4}$$