What is the value of a

The vertices of a rectangle are given in the columns of the matrix . if is found to perform a transformation, what are the coordinates of the transformed rectangle? (0, 0), (0, –3), (–3, –3), (–3, 0) (0, 0), (0, 3), (3, 3), (3, 0) (0, 0), (0, 3), (–3, –3), (–3, 0) (0, 0), (0, 3), (–3, 3), (–3, 0)

Find the greatest common factor of -30x 4 yz 3 and 75x 4 z 2.

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)