Datrys =25x^2/4-10x+(-10x+16)

$$= \frac { 25 x ^ { 2 } } { 4 } - 10 x + ( - 10 x + 16 )$$

Enrhifo

$$\frac{\left(5x-8\right)^{2}}{4}$$

Camau Ateb Byr

Cyfuno -10x a -10x i gael -20x.

$$\frac{25x^{2}}{4}-20x+16$$

I ychwanegu neu dynnu mynegiannau, rhaid i chi eu ehangu i wneud eu enwaduron yr un fath. Lluoswch -20x+16 â \frac{4}{4}.

$$\frac{25x^{2}}{4}+\frac{4\left(-20x+16\right)}{4}$$

Gan fod gan \frac{25x^{2}}{4} a \frac{4\left(-20x+16\right)}{4} yr un dynodydd, adiwch nhw drwy adio eu rhifiaduron.

$$\frac{25x^{2}+4\left(-20x+16\right)}{4}$$

Gwnewch y gwaith lluosi yn 25x^{2}+4\left(-20x+16\right).

$$\frac{25x^{2}-80x+64}{4}$$

Ffactor

$$\frac{\left(5x-8\right)^{2}}{4}$$

Camau Ateb

Ffactora allan \frac{1}{4}.

$$\frac{25x^{2}-40x-40x+64}{4}$$

Ystyriwch 25x^{2}-40x-40x+64. Lluosi a chyfuno termau sydd yr un fath.

$$25x^{2}-80x+64$$

Ystyriwch 25x^{2}-80x+64. Defnyddiwch y fformiwla sgwâr perffaith, a^{2}-2ab+b^{2}=\left(a-b\right)^{2}, lle a=5x a b=8.

$$\left(5x-8\right)^{2}$$

Ailysgrifennwch y mynegiad cyfan wedi'i ffactorio.

$$\frac{\left(5x-8\right)^{2}}{4}$$