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  • If a and b are the roots of x² - px + q = 0 , then a² + b² =

If a and b are the roots of x² - px + q = 0 , then a² + b² =

Answers (1)

Sum of the roots

(a+b) = p

product of the roots 

ab=q

(a+b)2=a2+b2+2ab

p2=a2+b2+2q implies

a2+b2 = p2 -2q

 

Posted by

Safeer PP

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