If a and b are the roots of quadratic equation x2-2x+4=o then a9+b9 =
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a+b=2. ab= 4
now x^2=2x-4
square both sides.
on LHS we get x^4 and on RHS substitute x^2 by 2x-4 to get a linear relation in x.
Again square both sides and follow abv procedure . now multiply x on both sides.
Now put x=a and x=b in final result and add
now x^2=2x-4
square both sides.
on LHS we get x^4 and on RHS substitute x^2 by 2x-4 to get a linear relation in x.
Again square both sides and follow abv procedure . now multiply x on both sides.
Now put x=a and x=b in final result and add
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