(3x²-2)-(4x²-2x-3)+(2x-3)+(2x²-1)其中x= -1
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![(3x²-2)-(4x²-2x-3)+(2x-3)+(2x²-1)其中x= -1](/uploads/image/z/2095816-40-6.jpg?t=%EF%BC%883x%26%23178%3B-2%29-%284x%26%23178%3B-2x-3%29%2B%282x-3%29%2B%282x%26%23178%3B-1%29%E5%85%B6%E4%B8%ADx%3D+-1)
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(3x²-2)-(4x²-2x-3)+(2x-3)+(2x²-1)其中x= -1
(3x²-2)-(4x²-2x-3)+(2x-3)+(2x²-1)其中x= -1
(3x²-2)-(4x²-2x-3)+(2x-3)+(2x²-1)其中x= -1
(3x²-2)-(4x²-2x-3)+(2x-3)+(2x²-1)
=3x²-2-4x²+2x+3+2x-3+2x²-1
=x²+4x-3
=(-1)²-1×4-3
=-6