a) 3x(1/2 - 2y + 6)= b) 2ab (a - 2b + 3)= c) ( 2x - 4y - 3xy + 1 ) * (-3xy) = d) 1/4 abc * (4a - 8b + 12c - 8 ) = e) 2* ( x -3) + 3 * (x + 1 ) = f) -3 * ( 2x - 4y ) - ( x - 3y ) =

a) 3x(1/2 - 2y + 6)= 1½x -6xy +18x b) 2ab (a - 2b + 3)= 2a²b-4ab² +6ab c) ( 2x - 4y - 3xy + 1 ) * (-3xy) = -6x²y-12xy²+9x²y² -3xy d) 1/4 abc * (4a - 8b + 12c - 8 ) = a²bc -2ab²c +3abc² -2abc e) 2* ( x -3) + 3 * (x + 1 ) = 2x-6 +3x+3 = 5x -3 f) -3 * ( 2x - 4y ) - ( x - 3y ) = -6x +12y -x +3y= -7x +15y

a) 3x(1/2 - 2y + 6)=3/2 x -6xy+18x=19 i 1/2 x -6xy b) 2ab (a - 2b + 3)=2a²b-4ab²+6ab c) ( 2x - 4y - 3xy + 1 ) * (-3xy) =-6x²y+12xy²+9x²y²-3xy d) 1/4 abc * (4a - 8b + 12c - 8 ) =a²bc-2ab²c+3abc²-2abc e) 2* ( x -3) + 3 * (x + 1 ) =2x-6+3x+3=5x-3 f) -3 * ( 2x - 4y ) - ( x - 3y ) = -6x+12y-x+3y=-7x+15y