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3\left(b^{4}+6b^{3}+9b^{2}\right)
Tauwehea te 3.
b^{2}\left(b^{2}+6b+9\right)
Whakaarohia te b^{4}+6b^{3}+9b^{2}. Tauwehea te b^{2}.
\left(b+3\right)^{2}
Whakaarohia te b^{2}+6b+9. Whakamahia te tikanga tātai pūrua pā, p^{2}+2pq+q^{2}=\left(p+q\right)^{2}, ina p=b, ina q=3.
3b^{2}\left(b+3\right)^{2}
Me tuhi anō te kīanga whakatauwehe katoa.