If tanA and tanB the roots of the quadratic equation, `4x^(2)-7x+1=0` then evaluate `4sin^(2)(A+B)-7sin(A+B)*cos(A+B)+cos^(2)(A+B)`.

If tan A&tan B are the roots of the quadratic equation,ax^(2)+bx+c=0 then evaluate a sin^(2)(A+B)+b sin(A+B),*cos(A+B)+c cos^(2)(A+B)

If tan A & tan B are the roots of the quadratic equation a x^(2) +bx+c=0 then evaluate a sin^(2)(A+B)+b sin (A+B).cos (A+B)+cos^(2)(A+B)

If tan A&tan B are the roots of the quadratic equation x^(2)-ax+b=0 ,then the value of sin^(2)(A+B) is:

If tan A and tan B are the roots of the quadratic equation, 3x^(2)-10x-25=0, then the value of 3sin^(2)(A+B)-10sin(A+B)*cos(A+B)-25cos^(2)(A+B) is

If tan A & tan B are the roots of the quadratic equation x^2 - ax + b = 0 , then the value of sin^2 (A +B) is:

If tan A and tan B are the roots of the equation 3x^(2)-10x-25=0 then the value of 25cos^(2)(A+B)+10sin(A+B)cos(A+B)-3sin^(2)(A+B) is

If x = 2/3 and x =- 3 are the roots of the quadratic equation ax^(2) +7x+b = 0 then find the values of a and b.