Enrhifo
\frac{\left(1-7y\right)^{2}}{49}
Ehangu
y^{2}-\frac{2y}{7}+\frac{1}{49}
Graff
Rhannu
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\left(\frac{1}{7}-y\right)^{2}
Lluosi \frac{1}{7}-y a \frac{1}{7}-y i gael \left(\frac{1}{7}-y\right)^{2}.
\frac{1}{49}-\frac{2}{7}y+y^{2}
Defnyddio'r theorem binomaidd \left(a-b\right)^{2}=a^{2}-2ab+b^{2} i ehangu'r \left(\frac{1}{7}-y\right)^{2}.
\left(\frac{1}{7}-y\right)^{2}
Lluosi \frac{1}{7}-y a \frac{1}{7}-y i gael \left(\frac{1}{7}-y\right)^{2}.
\frac{1}{49}-\frac{2}{7}y+y^{2}
Defnyddio'r theorem binomaidd \left(a-b\right)^{2}=a^{2}-2ab+b^{2} i ehangu'r \left(\frac{1}{7}-y\right)^{2}.
Enghreifftiau
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