问题标题:
数学题一道,速度!化简求值题!若x=一又1/2,(1-2x)²(2x+1)²-(3+2x)²(3-2x)²有过程.
问题描述:
数学题一道,速度!化简求值题!
若x=一又1/2,(1-2x)²(2x+1)²-(3+2x)²(3-2x)²
有过程.
刘长林回答:
(1-2x)²(2x+1)²-(3+2x)²(3-2x)²=[(1-2x)(1+2x)]²-[(3+2x)(3-2x)]²=(1-4x²)²-(9-4x²)²=(1-4x²+9-4x²)(1-4x²-9+4x²)=(10-8x²)(-8...
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