Enrhifo
\left(7a+9b\right)^{2}
Ehangu
49a^{2}+126ab+81b^{2}
Rhannu
Copïo i clipfwrdd
\left(7a+9b\right)^{2}
Lluosi 7a+9b a 7a+9b i gael \left(7a+9b\right)^{2}.
49a^{2}+126ab+81b^{2}
Defnyddio'r theorem binomaidd \left(p+q\right)^{2}=p^{2}+2pq+q^{2} i ehangu'r \left(7a+9b\right)^{2}.
\left(7a+9b\right)^{2}
Lluosi 7a+9b a 7a+9b i gael \left(7a+9b\right)^{2}.
49a^{2}+126ab+81b^{2}
Defnyddio'r theorem binomaidd \left(p+q\right)^{2}=p^{2}+2pq+q^{2} i ehangu'r \left(7a+9b\right)^{2}.
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