Find a cubic polynomial with the sum, sum of the products of its zero taken two at a time and product of its zeros as 4, 1, -6 respectively.
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Answer:
Step-by-step explanation:
Cubic polynomial : - (α+β+∅)x +(αβ+β∅+∅α)-αβ∅ ----- eq 1
Given :
(α+β+∅) = 4 -------- eq 2 (Sum Of zeroes)
(αβ+β∅+∅α) = 1 ---------- eq 3 (Sum of product of zeroes)
αβ∅ = -6 ----------eq 4 (Product of zeroes)
Sub eq 2, 3 and 4 in eq 1;
- 4x + - (-6) = -4x + +6
+ -4x + 6 is the required polynomial
(For a cubic polynomial ax³ + bx² + cx + d, the zeroes are α, β and γ, where
α + β + γ = -b/a
αβ + βγ + γα = c/a
αβγ = - d/a )
Hope this helps....
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