How do you simplify #6^3 - 9^3#? Algebra Expressions, Equations, and Functions PEMDAS 1 Answer Alan P. Sep 30, 2015 #6^3-9^3=-513# Explanation: You could factor out a #3^3# from each term, but in the long run I think it is simpler to just do the arithmetic: #6^3 = 6xx6xx6 = 36xx6 =216# #9^3 = 9xx9xx9 = 81xx9 = 729# #6^3 - 9^3 = 216 - 729 = -513# Answer link Related questions What is PEMDAS? How do you use PEMDAS? How do you use order of operations to simplify #3(7-2)-8#? What are common mistakes students make with PEMDAS? How do you evaluate the expression #5[8+(3-1)]-2#? How do you simplify the expression #4(30-(3+1)^2)#? How do you evaluate the expression #x^4+x# if x=2? Is it okay to add first before subtracting in #4-6+3#? How do you simplify #(-3)^2+12*5#? How do you simplify #(4-2)^3-4*8+21div3#? See all questions in PEMDAS Impact of this question 2189 views around the world You can reuse this answer Creative Commons License