Question

if a and b are the roots of the equation x^-px+q=0 then find value of (a^+b^)​

Answer 1

Answer:

Step-by-step explanation:

Take x^2-px+q=0

Here given roots are a and b

Then root addition : a+b= -(-p)/1=p

root multiplication : ab=q/1=q

We know (a+b)^2=a^2+b^2-2ab

a^2+b^2=(a+b)^2+2ab

=p^2+2*q

=p^2+2q