已知3(x-½)²+4丨y+1丨=0,求3x²y²+2xy-7x²y²-3/2xy+2+4x²y²的值.
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已知3(x-½)²+4丨y+1丨=0,求3x²y²+2xy-7x²y²-3/2xy+2+4x²y²的值.
已知3(x-½)²+4丨y+1丨=0,求3x²y²+2xy-7x²y²-3/2xy+2+4x²y²的值.
已知3(x-½)²+4丨y+1丨=0,求3x²y²+2xy-7x²y²-3/2xy+2+4x²y²的值.
3(x-½)²+4丨y+1丨=0
所以x-1/2=0,y+1=0
x=1/2,y=-1
所以原式=1/2xy+2
=-1/4+2
=7/4