1) x-x/2-x/3 2) x+1/2+2x-1/4 3) -2(x-5)(-2+3x)-(x-5)(x-2)

1) x-x/2-x/3=6x/6-3x/6-2x/6=x/6 2) x+1/2+2x-1/4=3x+2/4-1/4=3x+1/4 3) -2(x-5)(-2+3x)-(x-5)(x-2) =-2(-2x+3x²+10-15x)-(x²-2x-5x+10)=-2(3x²-17x+10)-x²+7x-10=-6x²+34x-20-x²+7x-10=-7x²+41x-30

1) x-x/2-x/3 / *6 6x - 3x - 2x x 2) x+1/2+2x-1/4 / *4 4x + 2 + 8x - 1 12x + 1 3) -2(x-5)(-2+3x)-(x-5)(x-2)