Tauwehe
\left(a-4\right)\left(a-2\right)\left(a+2\right)\left(a+4\right)
Aromātai
a^{4}-20a^{2}+64
Tohaina
Kua tāruatia ki te papatopenga
a^{4}-20a^{2}+64=0
Kia tauwehea ai te kīanga, me whakaoti te whārite ina ōrite ki te 0.
±64,±32,±16,±8,±4,±2,±1
Tā te Rational Root Theorem, ko ngā pūtake whakahau katoa o tētahi pūrau kei te āhua o \frac{p}{q}, ina wehea e p te kīanga pūmau 64, ā, ka wehea e q te whakarea arahanga 1. Whakarārangitia ngā kaitono katoa \frac{p}{q}.
a=2
Kimihia tētahi pūtake pērā mā te whakamātau i ngā uara tau tōpū katoa, e tīmata ana i te mea iti rawa mā te uara pū. Mēnā kāore he pūtake tau tōpū e kitea, whakamātauria ngā hautanga.
a^{3}+2a^{2}-16a-32=0
Mā te whakatakotoranga Tauwehe, he tauwehe te a-k o te pūrau mō ia pūtake k. Whakawehea te a^{4}-20a^{2}+64 ki te a-2, kia riro ko a^{3}+2a^{2}-16a-32. Kia tauwehea ai te otinga, me whakaoti te whārite ina ōrite ki te 0.
±32,±16,±8,±4,±2,±1
Tā te Rational Root Theorem, ko ngā pūtake whakahau katoa o tētahi pūrau kei te āhua o \frac{p}{q}, ina wehea e p te kīanga pūmau -32, ā, ka wehea e q te whakarea arahanga 1. Whakarārangitia ngā kaitono katoa \frac{p}{q}.
a=-2
Kimihia tētahi pūtake pērā mā te whakamātau i ngā uara tau tōpū katoa, e tīmata ana i te mea iti rawa mā te uara pū. Mēnā kāore he pūtake tau tōpū e kitea, whakamātauria ngā hautanga.
a^{2}-16=0
Mā te whakatakotoranga Tauwehe, he tauwehe te a-k o te pūrau mō ia pūtake k. Whakawehea te a^{3}+2a^{2}-16a-32 ki te a+2, kia riro ko a^{2}-16. Kia tauwehea ai te otinga, me whakaoti te whārite ina ōrite ki te 0.
a=\frac{0±\sqrt{0^{2}-4\times 1\left(-16\right)}}{2}
Ka taea ngā whārite katoa o te momo ax^{2}+bx+c=0 te whakaoti mā te ture pūrua: \frac{-b±\sqrt{b^{2}-4ac}}{2a}. Whakakapia te 1 mō te a, te 0 mō te b, me te -16 mō te c i te ture pūrua.
a=\frac{0±8}{2}
Mahia ngā tātaitai.
a=-4 a=4
Whakaotia te whārite a^{2}-16=0 ina he tōrunga te ±, ina he tōraro te ±.
\left(a-4\right)\left(a-2\right)\left(a+2\right)\left(a+4\right)
Me tuhi anō te kīanga whakatauwehe mā ngā pūtake i riro.
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