CBSE Class 10 Answered
polyomial
Asked by | 19 May, 2009, 04:06: PM
Expert Answer
Let α and β be the roots of the polynomial f(x)=x2 -8x+k
Then, α + β = 8 and αβ = k
According to the question, α2+ β2 = 40
α2+ β2 = (α+ β)2 - 2αβ
On sunstitution, we get
40 = 82 - 2k
40 = 64 - 2k
2k = 24
k =12
Answered by | 19 May, 2009, 04:25: PM
CBSE 10 - Maths
Asked by hanugraha | 30 May, 2010, 07:53: PM
ANSWERED BY EXPERTCBSE 10 - Maths
Asked by hanugraha | 30 May, 2010, 07:13: PM
ANSWERED BY EXPERTCBSE 10 - Maths
Asked by shobhitdc | 29 May, 2010, 04:59: PM
ANSWERED BY EXPERTCBSE 10 - Maths
Asked by ROJAAPPA | 29 May, 2010, 12:58: PM
ANSWERED BY EXPERTCBSE 10 - Maths
Asked by shobhitdc | 29 May, 2010, 10:52: AM
ANSWERED BY EXPERTCBSE 10 - Maths
Asked by devanshmudgal | 28 May, 2010, 07:31: PM
ANSWERED BY EXPERTCBSE 10 - Maths
Asked by shobhitdc | 28 May, 2010, 01:12: PM
ANSWERED BY EXPERTCBSE 10 - Maths
Asked by shobhitdc | 28 May, 2010, 01:08: PM
ANSWERED BY EXPERT
