Question
If the sum of two of the roots of x3+px2+qx+r=0 is zero, then pq =
Answer: Option B
:
B
Given that,α +β= 0
α +β +γ = -p⇒ γ = -p
Substitutingγ = -p in the given equation
⇒ −p3+p3−pq+r=0⇒ pq =r
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:
B
Given that,α +β= 0
α +β +γ = -p⇒ γ = -p
Substitutingγ = -p in the given equation
⇒ −p3+p3−pq+r=0⇒ pq =r
Was this answer helpful ?
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