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एक द्विघात बहुपद ज्ञात कीजिए , जिसक...

एक द्विघात बहुपद ज्ञात कीजिए , जिसके शून्यको के योग तथा गुणनफल क्रमश : दी हुई संख्याएँ है :
(I )`(1)/(4),-1`
`(ii) sqrt(2) , (1)/(3)`
`(iii) 0, sqrt(5)`

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