Enrhifo
8\left(m-2n\right)^{2}
Ehangu
8m^{2}-32mn+32n^{2}
Rhannu
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4m^{2}-16mn+16n^{2}+\left(2m-4n\right)^{2}
Defnyddio'r theorem binomaidd \left(a-b\right)^{2}=a^{2}-2ab+b^{2} i ehangu'r \left(2m-4n\right)^{2}.
4m^{2}-16mn+16n^{2}+4m^{2}-16mn+16n^{2}
Defnyddio'r theorem binomaidd \left(a-b\right)^{2}=a^{2}-2ab+b^{2} i ehangu'r \left(2m-4n\right)^{2}.
8m^{2}-16mn+16n^{2}-16mn+16n^{2}
Cyfuno 4m^{2} a 4m^{2} i gael 8m^{2}.
8m^{2}-32mn+16n^{2}+16n^{2}
Cyfuno -16mn a -16mn i gael -32mn.
8m^{2}-32mn+32n^{2}
Cyfuno 16n^{2} a 16n^{2} i gael 32n^{2}.
4m^{2}-16mn+16n^{2}+\left(2m-4n\right)^{2}
Defnyddio'r theorem binomaidd \left(a-b\right)^{2}=a^{2}-2ab+b^{2} i ehangu'r \left(2m-4n\right)^{2}.
4m^{2}-16mn+16n^{2}+4m^{2}-16mn+16n^{2}
Defnyddio'r theorem binomaidd \left(a-b\right)^{2}=a^{2}-2ab+b^{2} i ehangu'r \left(2m-4n\right)^{2}.
8m^{2}-16mn+16n^{2}-16mn+16n^{2}
Cyfuno 4m^{2} a 4m^{2} i gael 8m^{2}.
8m^{2}-32mn+16n^{2}+16n^{2}
Cyfuno -16mn a -16mn i gael -32mn.
8m^{2}-32mn+32n^{2}
Cyfuno 16n^{2} a 16n^{2} i gael 32n^{2}.
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