Enrhifo
10x+15
Ehangu
10x+15
Graff
Rhannu
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x^{2}+8x+16-\left(x-1\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}-2x+1\right)
Defnyddio'r theorem binomaidd \left(a-b\right)^{2}=a^{2}-2ab+b^{2} i ehangu'r \left(x-1\right)^{2}.
x^{2}+8x+16-x^{2}+2x-1
I ddod o hyd i wrthwyneb x^{2}-2x+1, dewch o hyd i wrthwyneb pob term.
8x+16+2x-1
Cyfuno x^{2} a -x^{2} i gael 0.
10x+16-1
Cyfuno 8x a 2x i gael 10x.
10x+15
Tynnu 1 o 16 i gael 15.
x^{2}+8x+16-\left(x-1\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}-2x+1\right)
Defnyddio'r theorem binomaidd \left(a-b\right)^{2}=a^{2}-2ab+b^{2} i ehangu'r \left(x-1\right)^{2}.
x^{2}+8x+16-x^{2}+2x-1
I ddod o hyd i wrthwyneb x^{2}-2x+1, dewch o hyd i wrthwyneb pob term.
8x+16+2x-1
Cyfuno x^{2} a -x^{2} i gael 0.
10x+16-1
Cyfuno 8x a 2x i gael 10x.
10x+15
Tynnu 1 o 16 i gael 15.
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