Published by:
CGP EDU Academic Team
Published on: August 14, 2026
If a and b are the roots of the equation x 2 - 7x-1 = 0, then the value of 
is equal to
Text Solution
Verified by ExpertsThe correct answer is:
51
(51)
Since, a and b are roots of x 2 - 7x - 1 = 0, so
a 2 - 7a - 1 = 0
a 2 - 1 = 7a
a 4 + 1 - 2a 2 = 49a 2
a 4 + l = 51a 2 ...
Similarly,
b 4 + l = 51b 2 ...
Now,
= 51
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