Ehangu
25u^{4}+90u^{2}+81
Enrhifo
\left(5u^{2}+9\right)^{2}
Rhannu
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25\left(u^{2}\right)^{2}+90u^{2}+81
Defnyddio'r theorem binomaidd \left(a+b\right)^{2}=a^{2}+2ab+b^{2} i ehangu'r \left(5u^{2}+9\right)^{2}.
25u^{4}+90u^{2}+81
I godi pŵer rhif i bŵer arall, lluoswch yr esbonyddion. Lluoswch 2 a 2 i gael 4.
25\left(u^{2}\right)^{2}+90u^{2}+81
Defnyddio'r theorem binomaidd \left(a+b\right)^{2}=a^{2}+2ab+b^{2} i ehangu'r \left(5u^{2}+9\right)^{2}.
25u^{4}+90u^{2}+81
I godi pŵer rhif i bŵer arall, lluoswch yr esbonyddion. Lluoswch 2 a 2 i gael 4.
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