x=3/2 y=-2 化简x-2(1/4x-1/3y²)+(-3/2x+1/3y²),在求职
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x=3/2 y=-2 化简x-2(1/4x-1/3y²)+(-3/2x+1/3y²)
=x-1/2x+2/3y²-3/2x+1/3y²
=-x+y²
=-3/2+(-2)²
=-3/2+4
=5/2======以下答案可供参考======
供参考答案1:
x-2(1/4x-1/3y²)+(-3/2x+1/3y²)
=x-½x+2/3y²-3/2x+1/3y²
=-x+y²
=-3/2+4
=5/2供参考答案2:
x-2(1/4x-1/3y²)+(-3/2x+1/3y²)
=X-1/2X-2/3Y^2-3/2X+1/3Y^2
=-X-1/3Y^2
当X=3/2,Y=-2时,
原式=-3/2-4/3=-17/6。