6x²-(2x-1)(3x-2)+(x+2)(x-2)
=6-(6x²-7x+2)+x²-4
=x²+7x-6
=-32/9
【(3x+4y)²-3x(3x+4y)】÷(-½y)
=9x²+24xy+16y²-9x²-12xy÷(-½y)
=-2*(16y²+12xy)/y
=-2(16y+12x)
=72
6x²-(2x-1)(3x-2)+(x+2)(x-2)
=6-(6x²-7x+2)+x²-4
=x²+7x-6
=-32/9
【(3x+4y)²-3x(3x+4y)】÷(-½y)
=9x²+24xy+16y²-9x²-12xy÷(-½y)
=-2*(16y²+12xy)/y
=-2(16y+12x)
=72