निम्न द्विघात बहुपदों के शून्यक ज्ञात ...

निम्न द्विघात बहुपदों के शून्यक ज्ञात कीजिए और शून्यकों तथा गुणांकों के बीच के सबंध की सत्यता की जाँच कीजिए :
`(i) x^(2) -2x -8`
`(ii) 4s^(2) -4x +1`
`(iii) 6x^(2) -3-7x`
`(iv) 4u^(2) +8u`
`(v) t^(2) -15`
`(vi) 3x^(2) -x -4`

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