The Condition that one root of x^3+px^2+qx+r=0 is sum of the other two roots, is
a)q^3 = 4(pq - 2r)
b)p^3 = 4(pq- 2r)
c)r^3 = 4(pr- 2q)
4)p^3 = 4(pq- r)
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Answer:
option b is right answer
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