已知2x²-6x-﹙1/2﹚˜²=0,求x²-3x/x⁴-6x³+9x²的值.
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已知2x²-6x-﹙1/2﹚˜²=0,求x²-3x/x⁴-6x³+9x²的值.
已知2x²-6x-﹙1/2﹚˜²=0,求x²-3x/x⁴-6x³+9x²的值.
已知2x²-6x-﹙1/2﹚˜²=0,求x²-3x/x⁴-6x³+9x²的值.
∵2x²-6x-﹙1/2﹚˜²=0
∴x²-3x=1/8
(x²-3x)/(x⁴-6x³+9x²)
=(x²-3x)/(x²-3x)²
=1/(x²-3x)
=1/(-1/8)
=-8