Find the quadric polynomial .
for the zeroes of

given in each case 2,-1
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The minimal quadratic polynomial with roots 2 & –1 is
x²–(2–1)x +(2)(–1)
ie., f(x) = x²–x–2
and the family of such quadratic functions is given by :
p(x) ≡ k(x²–x–2)
where, k ∈ ℝ : k≠0
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