Question

solve for x by quadratic equation (3x+a)(3x+b) = ab

Answer 1

Answer:

9x^2+3bx+3ax+ab=ab

9x^2=-3x(a+b)

X=-(a+b)/3

Answer 2

Answer:

9x^2+3xa+3xb+ab=ab

9x^2+3xa+3xb=0

3x^2+x(a+b)=0

x={-(a+b)+(a+b)}/6 , {-(a+b)-(a+b)}/6

x=0 , -(a+b)/3