Enrhifo
-16x
Ehangu
-16x
Graff
Rhannu
Copïo i clipfwrdd
x^{2}-8x+16-\left(x+4\right)^{2}
Defnyddio'r theorem binomaidd \left(a-b\right)^{2}=a^{2}-2ab+b^{2} i ehangu'r \left(x-4\right)^{2}.
x^{2}-8x+16-\left(x^{2}+8x+16\right)
Defnyddio'r theorem binomaidd \left(a+b\right)^{2}=a^{2}+2ab+b^{2} i ehangu'r \left(x+4\right)^{2}.
x^{2}-8x+16-x^{2}-8x-16
I ddod o hyd i wrthwyneb x^{2}+8x+16, dewch o hyd i wrthwyneb pob term.
-8x+16-8x-16
Cyfuno x^{2} a -x^{2} i gael 0.
-16x+16-16
Cyfuno -8x a -8x i gael -16x.
-16x
Tynnu 16 o 16 i gael 0.
x^{2}-8x+16-\left(x+4\right)^{2}
Defnyddio'r theorem binomaidd \left(a-b\right)^{2}=a^{2}-2ab+b^{2} i ehangu'r \left(x-4\right)^{2}.
x^{2}-8x+16-\left(x^{2}+8x+16\right)
Defnyddio'r theorem binomaidd \left(a+b\right)^{2}=a^{2}+2ab+b^{2} i ehangu'r \left(x+4\right)^{2}.
x^{2}-8x+16-x^{2}-8x-16
I ddod o hyd i wrthwyneb x^{2}+8x+16, dewch o hyd i wrthwyneb pob term.
-8x+16-8x-16
Cyfuno x^{2} a -x^{2} i gael 0.
-16x+16-16
Cyfuno -8x a -8x i gael -16x.
-16x
Tynnu 16 o 16 i gael 0.
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