Enrhifo
-2
Ffactor
-2
Rhannu
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\frac{12\left(3-\sqrt{3}\right)}{\left(3+\sqrt{3}\right)\left(3-\sqrt{3}\right)}-8+2\sqrt{3}
Mae'n rhesymoli enwadur \frac{12}{3+\sqrt{3}} drwy luosi'r rhifiadur a'r enwadur â 3-\sqrt{3}.
\frac{12\left(3-\sqrt{3}\right)}{3^{2}-\left(\sqrt{3}\right)^{2}}-8+2\sqrt{3}
Ystyriwch \left(3+\sqrt{3}\right)\left(3-\sqrt{3}\right). Gellir trawsnewid lluosi yn wahaniaeth rhwng sgwariau drwy ddefnyddio’r rheol: \left(a-b\right)\left(a+b\right)=a^{2}-b^{2}.
\frac{12\left(3-\sqrt{3}\right)}{9-3}-8+2\sqrt{3}
Sgwâr 3. Sgwâr \sqrt{3}.
\frac{12\left(3-\sqrt{3}\right)}{6}-8+2\sqrt{3}
Tynnu 3 o 9 i gael 6.
2\left(3-\sqrt{3}\right)-8+2\sqrt{3}
Rhannu 12\left(3-\sqrt{3}\right) â 6 i gael 2\left(3-\sqrt{3}\right).
6-2\sqrt{3}-8+2\sqrt{3}
Defnyddio’r briodwedd ddosbarthu i luosi 2 â 3-\sqrt{3}.
-2-2\sqrt{3}+2\sqrt{3}
Tynnu 8 o 6 i gael -2.
-2
Cyfuno -2\sqrt{3} a 2\sqrt{3} i gael 0.
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699 * 533
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\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}