计算 (-2x²+½)(-2x²-½)(x+y+z)²(2a-3b-1)(1+3b-2a)
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计算 (-2x²+½)(-2x²-½)(x+y+z)²(2a-3b-1)(1+3b-2a)
计算 (-2x²+½)(-2x²-½)
(x+y+z)²
(2a-3b-1)(1+3b-2a)
计算 (-2x²+½)(-2x²-½)(x+y+z)²(2a-3b-1)(1+3b-2a)
(-2x²+½)(-2x²-½)
=4x^4-¼
(x+y+z)²
=(x+y)²+2z(x+y)+z²
=x²+2xy+y²+2xz+2yz+z²
(2a-3b-1)(1+3b-2a)
=-(1-2a+3b)(1+3b-2a)
=-[1-2(2a-3b)+(2a-3b)²]
=-1+4a-6b-4a²+12ab-9b²