若x²-y=3,则-2/3y+1/3x²+4=( )
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若x²-y=3,则-2/3y+1/3x²+4=( )
若x²-y=3,则-2/3y+1/3x²+4=( )
若x²-y=3,则-2/3y+1/3x²+4=( )
原式=1/3 (x²-2y)+4
=1/3×3+4
=1+4
=5
题目有误!
题目就这么多?没说x、y是整数之类的?要是这样那就是5-y/3