Enrhifo
\left(2x+9\right)^{2}-72
Ehangu
4x^{2}+36x+9
Graff
Rhannu
Copïo i clipfwrdd
4x^{2}+36x+81-72
Defnyddio'r theorem binomaidd \left(a+b\right)^{2}=a^{2}+2ab+b^{2} i ehangu'r \left(2x+9\right)^{2}.
4x^{2}+36x+9
Tynnu 72 o 81 i gael 9.
4x^{2}+36x+81-72
Defnyddio'r theorem binomaidd \left(a+b\right)^{2}=a^{2}+2ab+b^{2} i ehangu'r \left(2x+9\right)^{2}.
4x^{2}+36x+9
Tynnu 72 o 81 i gael 9.
Enghreifftiau
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