化简3(2x+1)(2x-1)-4(3x-2)(-3x+2)
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化简3(2x+1)(2x-1)-4(3x-2)(-3x+2)
![化简3(2x+1)(2x-1)-4(3x-2)(-3x+2)](/uploads/image/z/19407331-19-1.jpg?t=%E5%8C%96%E7%AE%803%282x%2B1%29%282x-1%29-4%283x-2%29%28-3x%2B2%29)
3(2x+1)(2x-1)-4(3x-2)(-3x+2)
=3(4x^2-1)+4(3x-2)^2
=12x^2-3+4(9x^2-12x+4)
=12x^2-3+36x^2-48x+16
=48x^2-48x+13
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谢谢
=3(4x^2-1)+4(3x-2)^2
=12x^2-3+4(9x^2-12x+4)
=12x^2-3+36x^2-48x+16
=48x^2-48x+13
不懂可追问
满意请采纳
谢谢
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