Hi

x^3 + 5x^2 -57x -189 = 0 (x+3) a factor, x = -3, a root

Using Synthetic Division

-3	1	5	-57	-189

		-3	-6	189

	1	2	-63	0

x^2 + 2x - 63 = 0

(x + 9)(x-7) = 0

(x+9)and (x+7)the height and depth(height greater than depth)

 (x+3)= 15 ,  x = 12

the height = (x+9) = 21, depth is (x-7) = 5

B.

 

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