CBSE Class 10 Answered
Polynomials. Question from RD Sharma
Asked by AkshayPathak12 | 14 Apr, 2010, 01:10: PM
Expert Answer
x2 + px + 45 = 0
If α and β are zeros, then
x2 - (α + β)x + αβ = 0
Comparing we read,
α + β = -p and αβ = 45.
Now,
(α - β)2 = 144 ... given
(α + β)2 - 4αβ = 144
p2 - (4)(45) = 144
p2 = 324
p = ±18
Regards,
Team,
TopperLearning.
Answered by | 14 Apr, 2010, 04:15: PM
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