Write x^2 - 6x + 7= 0 in the form (x-a)^2 b, where a and b are intergers.
(x-4)^2=3
(x-3)^2=2
(x-2)^2=1
(x-1)^2=4

Abag contains 4 red, 7 blue and 5 yellow marbles. event a is defined as drawing a yellow marble on the first draw and event b is defined as drawing a blue marble on the second draw. if two marbles are drawn from the bag, one after the other and not replaced, what is p(b|a) expressed in simplest form? a. 7/16 b. 7/15 c. 14/16 d. 14/15