28. What is the value of k, if one root of the quadratic equation x² - 4x +k=0
is 2+√3?
(A) - 1 (B) 1
(C) 2
(D) – 2
Answers
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3
Given :-
Required to find :-
Procedure :-
Let us take the following condition
≡
Now from above,
Now let us square the second condition and substitute first condition wherever required.
You then need to use (Angstrom symbol must be omitted as it came due to some error).
Substitute in condition to get k value.
Do it yourself and you would be able to do such problems yourself with no effort.
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