Enrhifo
2\left(7-x\right)^{2}+1
Ehangu
2x^{2}-28x+99
Graff
Rhannu
Copïo i clipfwrdd
2\left(49-14x+x^{2}\right)+1
Defnyddio'r theorem binomaidd \left(a-b\right)^{2}=a^{2}-2ab+b^{2} i ehangu'r \left(7-x\right)^{2}.
98-28x+2x^{2}+1
Defnyddio’r briodwedd ddosbarthu i luosi 2 â 49-14x+x^{2}.
99-28x+2x^{2}
Adio 98 a 1 i gael 99.
2\left(49-14x+x^{2}\right)+1
Defnyddio'r theorem binomaidd \left(a-b\right)^{2}=a^{2}-2ab+b^{2} i ehangu'r \left(7-x\right)^{2}.
98-28x+2x^{2}+1
Defnyddio’r briodwedd ddosbarthu i luosi 2 â 49-14x+x^{2}.
99-28x+2x^{2}
Adio 98 a 1 i gael 99.
Enghreifftiau
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y = 3x + 4
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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]
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\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
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\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
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\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
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\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}