How do you simplify #-3xy (2x - 7y) + 6xy (9xy (9y - 2x)#? Algebra Expressions, Equations, and Functions PEMDAS 1 Answer Kalyanam S. Jul 24, 2018 As below Explanation: #-3xy (2x - 7y) + 6xy (9xy (9y - 2x)# #=> -3x^2y + 21xy^2 + (6xy (81xy^2 - 18x^2y# #=> -3x^2y + 21xy^2 + 486 x^2y^3 - 108x^3y^2# #=> 3x^2y (162y^2-1) - 3xy^2(36x^2 - 7)# 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 1959 views around the world You can reuse this answer Creative Commons License