Enrhifo
\left(2-x\right)\left(x-a-3\right)
Ehangu
-x^{2}+ax+5x-2a-6
Graff
Rhannu
Copïo i clipfwrdd
x-2-\left(x^{2}-4x+4\right)+ax-2a
Defnyddio'r theorem binomaidd \left(a-b\right)^{2}=a^{2}-2ab+b^{2} i ehangu'r \left(x-2\right)^{2}.
x-2-x^{2}+4x-4+ax-2a
I ddod o hyd i wrthwyneb x^{2}-4x+4, dewch o hyd i wrthwyneb pob term.
5x-2-x^{2}-4+ax-2a
Cyfuno x a 4x i gael 5x.
5x-6-x^{2}+ax-2a
Tynnu 4 o -2 i gael -6.
x-2-\left(x^{2}-4x+4\right)+ax-2a
Defnyddio'r theorem binomaidd \left(a-b\right)^{2}=a^{2}-2ab+b^{2} i ehangu'r \left(x-2\right)^{2}.
x-2-x^{2}+4x-4+ax-2a
I ddod o hyd i wrthwyneb x^{2}-4x+4, dewch o hyd i wrthwyneb pob term.
5x-2-x^{2}-4+ax-2a
Cyfuno x a 4x i gael 5x.
5x-6-x^{2}+ax-2a
Tynnu 4 o -2 i gael -6.
Enghreifftiau
Hafaliad cwadratig
{ x } ^ { 2 } - 4 x - 5 = 0
Trigonometreg
4 \sin \theta \cos \theta = 2 \sin \theta
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y = 3x + 4
Rhifyddeg
699 * 533
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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]
Hafaliad ar y pryd
\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
Gwahaniaethu
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integreiddiad
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Terfynau
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}