If \( \alpha+\beta=-2 \) and \( \alpha^{3}+\beta^{3}=-56 \) then the quadratic equation whose ro...
If \( \alpha+\beta=-2 \) and \( \alpha^{3}+\beta^{3}=-56 \) then the quadratic equation whose roots are \( \alpha, \beta \) is
(a) \( x^{2}+2 x-16=0 \)
(b) \( x^{2}+2 x-15=0 \)
(c) \( x^{2}+2 x-12=0 \)
(d) \( x^{2}+2 x-8=0 \)
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