2x(a-b) + 3y(5a -5b) + 4z(2b -2a) we have to take out the common factors
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Solution
2x(a-b) + 3y(5a -5b) + 4z(2b -2a) 2x(a-b)+3y*5(a-b)+4z*-1*(a-b) here -1 is taken as common factor 2x(a-b)+15y(a-b)-4z(2a-2b) 2x(a-b)+15y(a-b)-4z*2(a-b) 2x(a-b)+15y(a-b)-8z(a-b) (a-b)(2x+15y-8z)