Enrhifo
20x
Ehangu
20x
Graff
Rhannu
Copïo i clipfwrdd
\left(x+5\right)^{2}-\left(x-5\right)^{2}
Lluosi x+5 a x+5 i gael \left(x+5\right)^{2}.
x^{2}+10x+25-\left(x-5\right)^{2}
Defnyddio'r theorem binomaidd \left(a+b\right)^{2}=a^{2}+2ab+b^{2} i ehangu'r \left(x+5\right)^{2}.
x^{2}+10x+25-\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}.
x^{2}+10x+25-x^{2}+10x-25
I ddod o hyd i wrthwyneb x^{2}-10x+25, dewch o hyd i wrthwyneb pob term.
10x+25+10x-25
Cyfuno x^{2} a -x^{2} i gael 0.
20x+25-25
Cyfuno 10x a 10x i gael 20x.
20x
Tynnu 25 o 25 i gael 0.
\left(x+5\right)^{2}-\left(x-5\right)^{2}
Lluosi x+5 a x+5 i gael \left(x+5\right)^{2}.
x^{2}+10x+25-\left(x-5\right)^{2}
Defnyddio'r theorem binomaidd \left(a+b\right)^{2}=a^{2}+2ab+b^{2} i ehangu'r \left(x+5\right)^{2}.
x^{2}+10x+25-\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}.
x^{2}+10x+25-x^{2}+10x-25
I ddod o hyd i wrthwyneb x^{2}-10x+25, dewch o hyd i wrthwyneb pob term.
10x+25+10x-25
Cyfuno x^{2} a -x^{2} i gael 0.
20x+25-25
Cyfuno 10x a 10x i gael 20x.
20x
Tynnu 25 o 25 i gael 0.
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