Enrhifo
\frac{\left(7k-2w\right)^{2}}{9}
Ehangu
\frac{4w^{2}-28kw+49k^{2}}{9}
Rhannu
Copïo i clipfwrdd
\frac{49}{9}k^{2}-\frac{28}{9}kw+\frac{4}{9}w^{2}
Defnyddio'r theorem binomaidd \left(a-b\right)^{2}=a^{2}-2ab+b^{2} i ehangu'r \left(\frac{7}{3}k-\frac{2}{3}w\right)^{2}.
\frac{49}{9}k^{2}-\frac{28}{9}kw+\frac{4}{9}w^{2}
Defnyddio'r theorem binomaidd \left(a-b\right)^{2}=a^{2}-2ab+b^{2} i ehangu'r \left(\frac{7}{3}k-\frac{2}{3}w\right)^{2}.
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