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Find the value of discriminant for each ...

Find the value of discriminant for each of the following quadratic equations:
`"(i) " x^(2)+4x+4=0 " (ii) " x^(2)+4x+1=0`
`"(iii) " 3x^(2)+2x+1=0`

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The correct Answer is:
(i) 0 (ii) 12 (iii) -8
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