Verify that 3, -2, 1 are the zeroes
the cubic polynomial p(x) =
( x³ - 2x²-5x + 6 and verify the
relation between its zeroes and
coefficient
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Answer:
Verification: p(x)= x^3-2x^2-5x+6
p(3) = 27-18-15+6=0
p(-2)=-8-8+10+6=0
p(1)=-1-5+6=0
Therefore 3,-2and 1 are the zeroes of the cubic polynomial p(x)=x^3-2x^2-5x+6
Relation between zeroes and coefficients:
alpha + beta + gamma =-b/a
3 + (-2)+1=-(-2)/1
1+1=2
2=2
(alpha beta+ beta gamma+ alpha gamma) =c/a
(3(-2)+(-2)1+3(1))= -5/1
-6 -2 +3= -5
-8+3= -5
-5 = -5
alpha beta gamma = -d/a
3(-2)1 = -6/1
-6 = -6
Hence ,verified.....
Hope it helpsss......✌✌
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