if one root of the equation is 2 + root 5 then the quadratic equation is
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Answer:If one root is 2+√5
Then other root will be 2-√5
So sum of roots= 4
And product of roots= -1
So the required quadratic equation
=> x²+4x-1=0
ananya9703:
How do we know that the other root is going to be 2 - √5
if alpha is 2 + root 5 then beta is 2 - root 5
Irrational roots exist in such conjugate pair only
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