5x²-3x²-x-4+3x²+2X-x²-9
=4x²+x-13
當x=-3/2時
原式=4*9/4-3/2-13
=-3/2-4
=-11/2
5x²-3x²-x-4+3x²+2X-x²-9 已知x=-一又二分之一
5x²-3x²-x-4+3x²+2X-x²-9 已知x=-一又二分之一
數(shù)學(xué)人氣:280 ℃時間:2020-02-05 00:24:41
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