Ehangu
49-21r+3r^{3}-r^{4}
Enrhifo
\left(-r^{2}+3r-7\right)\left(r^{2}-7\right)
Rhannu
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\left(-r^{2}\right)r^{2}-7\left(-r^{2}\right)+3r^{3}-21r-7r^{2}+49
Defnyddio’r briodwedd ddosbarthu i luosi -r^{2}+3r-7 â r^{2}-7.
\left(-r^{2}\right)r^{2}+7r^{2}+3r^{3}-21r-7r^{2}+49
Lluosi -7 a -1 i gael 7.
\left(-r^{2}\right)r^{2}+3r^{3}-21r+49
Cyfuno 7r^{2} a -7r^{2} i gael 0.
-r^{4}+3r^{3}-21r+49
Er mwyn lluosi pwerau sy’n rhannu’r un sail, adiwch eu esbonyddion. Adiwch 2 a 2 i gael 4.
\left(-r^{2}\right)r^{2}-7\left(-r^{2}\right)+3r^{3}-21r-7r^{2}+49
Defnyddio’r briodwedd ddosbarthu i luosi -r^{2}+3r-7 â r^{2}-7.
\left(-r^{2}\right)r^{2}+7r^{2}+3r^{3}-21r-7r^{2}+49
Lluosi -7 a -1 i gael 7.
\left(-r^{2}\right)r^{2}+3r^{3}-21r+49
Cyfuno 7r^{2} a -7r^{2} i gael 0.
-r^{4}+3r^{3}-21r+49
Er mwyn lluosi pwerau sy’n rhannu’r un sail, adiwch eu esbonyddion. Adiwch 2 a 2 i gael 4.
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.
Gwahaniaethu
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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}