计算3(2x+1)(2x-1)-4(3x-2)(3x+2)+6x(4x+1)
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计算3(2x+1)(2x-1)-4(3x-2)(3x+2)+6x(4x+1)
![计算3(2x+1)(2x-1)-4(3x-2)(3x+2)+6x(4x+1)](/uploads/image/z/1385985-57-5.jpg?t=%E8%AE%A1%E7%AE%973%282x%2B1%29%282x-1%29-4%283x-2%29%283x%2B2%29%2B6x%284x%2B1%29)
3(2x+1)(2x-1)-4(3x-2)(3x+2)+6x(4x+1)
=3(4x^2-1)-4(9x^2-4)+24x^2+6x
=12x^2-3-36x^2+16+24x^2+6x
=6x+13.
=3(4x^2-1)-4(9x^2-4)+24x^2+6x
=12x^2-3-36x^2+16+24x^2+6x
=6x+13.
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