kindly translate in english using google translator, answer in english only دع P (x) = x4 − 14x2 + 9.. (أ) أوجد جذور P (x) عن طريق (i) السماح لـ t = x2 ، (ii) باستخدام الصيغة التربيعية لإيجاد t ، و (iii) إيجاد

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