If one of the zeros of the cubic polynomial
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If one of the zeros of the cubic polynomial x^3+ax^2+bx+c is -1, then find the product of other two zeros.
Answered by admin @
Product of other two zeroes in the equation is –b.
Solution:
To find the zeroes of the cubic equation , let us say that the roots are
The expressions of roots are a
Now one of the root is -1, putting α=-1 and a=1,b=a,c=b,d=c in the expression,
To find the product of other zeroes we use
we get .
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