Enrhifo
\alpha ^{2}+\beta ^{2}
Ehangu
\alpha ^{2}+\beta ^{2}
Rhannu
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\alpha ^{2}+2\alpha \beta +\beta ^{2}-2\alpha \beta
Defnyddio'r theorem binomaidd \left(a+b\right)^{2}=a^{2}+2ab+b^{2} i ehangu'r \left(\alpha +\beta \right)^{2}.
\alpha ^{2}+\beta ^{2}
Cyfuno 2\alpha \beta a -2\alpha \beta i gael 0.
\alpha ^{2}+2\alpha \beta +\beta ^{2}-2\alpha \beta
Defnyddio'r theorem binomaidd \left(a+b\right)^{2}=a^{2}+2ab+b^{2} i ehangu'r \left(\alpha +\beta \right)^{2}.
\alpha ^{2}+\beta ^{2}
Cyfuno 2\alpha \beta a -2\alpha \beta i gael 0.
Enghreifftiau
Hafaliad cwadratig
{ x } ^ { 2 } - 4 x - 5 = 0
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y = 3x + 4
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\left[ \begin{array} { l l } { 2 } & { 3 } \\ { 5 } & { 4 } \end{array} \right] \left[ \begin{array} { l l l } { 2 } & { 0 } & { 3 } \\ { -1 } & { 1 } & { 5 } \end{array} \right]
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Terfynau
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