CBSE Class 10 Answered
Find the value of 'p' so that the quadratic polynomial(p-5)t^2+4(p-5)t+5 has equal zero.
Asked by deorajsahoo143 | 17 Jan, 2020, 03:38: PM
Expert Answer
(p - 5)t2 + 4(p - 5)t + 5 = 0
Here a = p - 5, b = 4(p - 5), c = 5
The quadratic polynomial has equal zero.
Hence,
b2 - 4ac = 0
16(p - 5)2 - 20(p - 5) = 0
(p - 5) (16p - 80 - 20) = 0
(p - 5) (16p - 100) = 0
p = 5 and p = 100/16 = 25/4
Answered by Sneha shidid | 17 Jan, 2020, 05:11: PM
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