Enrhifo
\left(2x+1\right)^{3}-4
Ehangu
8x^{3}+12x^{2}+6x-3
Graff
Rhannu
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8x^{3}+12x^{2}+6x+1-4
Defnyddio'r theorem binomaidd \left(a+b\right)^{3}=a^{3}+3a^{2}b+3ab^{2}+b^{3} i ehangu'r \left(2x+1\right)^{3}.
8x^{3}+12x^{2}+6x-3
Tynnu 4 o 1 i gael -3.
8x^{3}+12x^{2}+6x+1-4
Defnyddio'r theorem binomaidd \left(a+b\right)^{3}=a^{3}+3a^{2}b+3ab^{2}+b^{3} i ehangu'r \left(2x+1\right)^{3}.
8x^{3}+12x^{2}+6x-3
Tynnu 4 o 1 i gael -3.
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