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Question 11 (1 point) Which expression is the difference of two cubes? O-9x3 + 64 O-8x3 - 64 973 - 16 O 25-49y Question 12 (1 point) Write the expression 729 - 512x3y in factored form. ( (+ Bay)(9 - 8xy) O (+ 8xy)(81 - 72xy + 64x y?) O (- 8xy)(81 + 72xy + 64x y?) O (9- 8xy ) (81 - 72xy + 64x y' ) Question 13 (1 point) Which expression is the sum of two cubes? O-8x3 + 64 O-8x2 - 64 O 973 + 16 25-4932 Question 14 (1 point) Determine the intervals you would check to determine when *(x) - 2x3 + 5x3 - 28x - 15 is negative. Ox =-0.5,-5,3 Ox = 0.5,5,-3 (-5 3 Ox-5,-5exe-0.5, -0.5 3