Question 1058051
Multiply the three matrices together to get:


 *[illustration Matrices.png]


6x^2 + 4x - 5x + 11 + 12x - 6 = 0


6x^2 + 11x + 5 = 0


(6x + 5)(x + 1) = 0


x = -5/6, x = -1