[" 90.If "alpha,beta" are the roots of "],[x^(2)-(a-2)x-(a+1)=0" where "^(6)a" ' is a "],[" variable then the least value of "],[alpha^(2)+beta^(2)" is "]

If alpha and beta are the roots of x^(2)-(a-2)x-(a+1)=0 where a is a variable then the least value of alpha^(2)+beta^(2)

If alpha , beta are the roots of x^2 -(a-2) x- (a +1) =0 where a is a variable then the least value of alpha ^2 + beta ^2 is

If alpha,beta are the roots of the quadratic equation x^2-(a-2)x-(a+1)=0 , where a is a variable, then the least value of alpha^2+beta^2 is

If alpha, beta are the roots of x^(2)-(a-2)x-(a+1)=0 where 'a' is a variable then the minimum value of alpha^(2)+beta^(2) is

If alpha,beta and 1 are the roots of x^(3)-2x^(2)-5x+6=0 then (alpha,beta)=

If alpha and beta are the roots of x^(2)-2x+4=0 then the value of alpha^(6)+beta^(6) is

IF alpha , beta are the roots of x^(2)-x+2=0 then alpha ^ 2 beta + alpha beta ^2 =

If alpha and beta are the roots of equation x^(2)-a(x+1)-b=0 where a,beR-{0} and a+b!=0 then the value of (1)/(alpha^(2)-a alpha)+(1)/(beta^(2)-a beta)-(2)/(a+b)

If alpha, beta, 1 are the roots of x ^(3) - 2x ^(2) - 7x + 6 =0, then find alpha, beta.