How do you simplify #3x (x -1) - 4 (x^2 - x)#? Algebra Expressions, Equations, and Functions PEMDAS 1 Answer NJ Mar 26, 2018 #=>-x^2+x# Explanation: #=>3x(x-1)-4(x^2-x)# #=>3x^2-3x-4x^2+4x# #=>-x^2+x# 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 1412 views around the world You can reuse this answer Creative Commons License