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Show that the expression (x+y)(x-y)-16x+64 may be written as the difference of two squares, and then factor the expression.? In the x column, begin at -2, increment by 1 and finish at 2 (41 rows).In the y column, use above formula, referencing appropriate x-value.? Why are seeds important in the life cycle of plants? Find the Left Riemann Sum that approximates the area under the curve of y=e^(4x) on the interval [0,2] with 8 rectangles.? How many kilometers in a meter?