divisible by (Q-1)^2: True
G(A,1) = -27*(-8*A**2 + 12*A*l + 6*A - l)**2/4
G(A,1) as poly in A: [-432, 1296*l + 648, -972*l**2 - 1080*l - 243, 162*l**2 + 81*l, -27*l**2/4]
lam=1/4: G(A,1) real roots in A: [0.0284998, 0.0284998, 1.09650, 1.09650] ; sign at A=10: -1
lam=3/4: G(A,1) real roots in A: [0.0514096, 0.0514096, 1.82359, 1.82359] ; sign at A=10: -1
lam=2: G(A,1) real roots in A: [0.0678960, 0.0678960, 3.68210, 3.68210] ; sign at A=10: -1
