Posted by Laruen on Monday, October 29, 2012 at 2:31pm.
#21. ok #22. 3x^3 = 3(-2)^3 = 3(-8) = -24 (3x)^3 = (-6)^3 = -216 Not sure how you came up with -221, since 221 is neither a perfect cube, nor a multiple of 3. #23. ok #24. ok