Ffactor
\frac{\left(4b-9a\right)^{2}}{36}
Enrhifo
\frac{\left(4b-9a\right)^{2}}{36}
Rhannu
Copïo i clipfwrdd
\frac{16b^{2}+81a^{2}-72ab}{36}
Ffactora allan \frac{1}{36}.
\left(-9a+4b\right)^{2}
Ystyriwch 16b^{2}+81a^{2}-72ab. Defnyddiwch y fformiwla sgwâr perffaith, p^{2}+2pq+q^{2}=\left(p+q\right)^{2}, lle p=-9a a q=4b.
\frac{\left(-9a+4b\right)^{2}}{36}
Ailysgrifennwch y mynegiad cyfan wedi'i ffactorio.
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\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}