Enrhifo
\left(7x+3z\right)^{2}
Ehangu
49x^{2}+42xz+9z^{2}
Rhannu
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\left(7x+3z\right)^{2}
Cyfuno 3x a 4x i gael 7x.
49x^{2}+42xz+9z^{2}
Defnyddio'r theorem binomaidd \left(a+b\right)^{2}=a^{2}+2ab+b^{2} i ehangu'r \left(7x+3z\right)^{2}.
\left(7x+3z\right)^{2}
Cyfuno 3x a 4x i gael 7x.
49x^{2}+42xz+9z^{2}
Defnyddio'r theorem binomaidd \left(a+b\right)^{2}=a^{2}+2ab+b^{2} i ehangu'r \left(7x+3z\right)^{2}.
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