Enrhifo
\left(4-x\right)\left(x+14\right)
Ehangu
56-10x-x^{2}
Graff
Rhannu
Copïo i clipfwrdd
81-\left(x^{2}+10x+25\right)
Defnyddio'r theorem binomaidd \left(a+b\right)^{2}=a^{2}+2ab+b^{2} i ehangu'r \left(x+5\right)^{2}.
81-x^{2}-10x-25
I ddod o hyd i wrthwyneb x^{2}+10x+25, dewch o hyd i wrthwyneb pob term.
56-x^{2}-10x
Tynnu 25 o 81 i gael 56.
81-\left(x^{2}+10x+25\right)
Defnyddio'r theorem binomaidd \left(a+b\right)^{2}=a^{2}+2ab+b^{2} i ehangu'r \left(x+5\right)^{2}.
81-x^{2}-10x-25
I ddod o hyd i wrthwyneb x^{2}+10x+25, dewch o hyd i wrthwyneb pob term.
56-x^{2}-10x
Tynnu 25 o 81 i gael 56.
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