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cubed is when you times the number by itself 3 times e.g. 3times3times3=27=cubed
When a number is cubed, such as 3, that means you multiply it by itself 3 times. Example: 3 cubed = 3x3x3 = 27 It means that when you have a number ex 2 you times it to the power of 3 so 2x2x2=8 because 2x2=4x2=8. Cool.
-3 cubed is simply (-3)(-3)(-3), so -3 x -3 = 9 and 9 x -3 = -27 ... As a guideline, when a number is cubed the answer will have the same sign (positive or negative) as the number you start with.
2x^2y^3(4x^2 - 3xy + 1)