ulie Huuulu
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(A.I.C.B.S.E.
9. Finu le 2010
the zeroes and the coefficients.
10. Find k, if – 5 is a zero of 3x2 + 8x - k.
of the quadratic polynomial is x2 + 3x + k is 2, then find k
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1
Answer:
Let the zero of polynomial be α,7α
sum of roots is given by
a
−b
=
3
8
8α=
3
8
α=
3
1
product of roots $
a
c
=2k+1
7α
2
=2k+1
9
7
=2k+1
2k=
9
−2
k=
9
−1
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