(3x-2)²= (3x)²+2(3x)(-2)+(-2)²=9x²-12x+4
(x-1)²=x²+2(x)(-1)+(-1)²=x²-2x+1
4(9x²-12x+4)-9(x²-2x+1)=36x²-48x+16-9x²+18x-9=36x²-9x²-48x+18x+16-9
=27x²-30x+7
que sería la respuesta
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(3x-2)²= (3x)²+2(3x)(-2)+(-2)²=9x²-12x+4
(x-1)²=x²+2(x)(-1)+(-1)²=x²-2x+1
4(9x²-12x+4)-9(x²-2x+1)=36x²-48x+16-9x²+18x-9=36x²-9x²-48x+18x+16-9
=27x²-30x+7
que sería la respuesta