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3\times 3x^{3-1}+2\left(-9\right)x^{2-1}+8x^{1-1}
Ko te pārōnaki o tētahi pūrau ko te tapeke o ngā pārōnaki o ōna kīanga tau. Ko te pārōnaki o tētahi kīanga tau pūmau ko 0. Ko te pārōnaki o te ax^{n} ko te nax^{n-1}.
9x^{3-1}+2\left(-9\right)x^{2-1}+8x^{1-1}
Whakareatia 3 ki te 3.
9x^{2}+2\left(-9\right)x^{2-1}+8x^{1-1}
Tango 1 mai i 3.
9x^{2}-18x^{2-1}+8x^{1-1}
Whakareatia 2 ki te -9.
9x^{2}-18x^{1}+8x^{1-1}
Tango 1 mai i 2.
9x^{2}-18x^{1}+8x^{0}
Tango 1 mai i 1.
9x^{2}-18x+8x^{0}
Mō tētahi kupu t, t^{1}=t.
9x^{2}-18x+8\times 1
Mō tētahi kupu t mahue te 0, t^{0}=1.
9x^{2}-18x+8
Mō tētahi kupu t, t\times 1=t me 1t=t.