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Tohaina

ab\left(a^{2}+2a+1\right)
Tauwehea te ab.
\left(a+1\right)^{2}
Whakaarohia te a^{2}+2a+1. Whakamahia te tikanga tātai pūrua pā, p^{2}+2pq+q^{2}=\left(p+q\right)^{2}, ina p=a, ina q=1.
ab\left(a+1\right)^{2}
Me tuhi anō te kīanga whakatauwehe katoa.