Question 94485
3A^2(A-B)-6A(A-B)+21(A-B)
(3A^2-6A+21)(A-B) TOSOLVE THE QUADRATIC EQUATION (3A^2-6A+21) YOU NEED TO USE THE QUADRATIC FORMULA: {{{x = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}}