计算4x²(-2x+3)(-2x-3)
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计算4x²(-2x+3)(-2x-3)
计算4x²(-2x+3)(-2x-3)
计算4x²(-2x+3)(-2x-3)
原式=4x²-﹙4x²-9﹚
=4x²-4x²+9
=9.
4x²(-2x+3)(-2x-3)
=4x²(2x-3)(2x+3)
=4x²(4x²-9)
=16x^4-36x²
4x²(-2x+3)(-2x-3)=4x²[(-2x)²-3²]=16x^4-36x²