化简(-2x-1/4y+2z)²
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化简(-2x-1/4y+2z)²化简(-2x-1/4y+2z)²化简(-2x-1/4y+2z)²(-2x-1/4y+2z)²=(-2x-1/4y)²+
化简(-2x-1/4y+2z)²
化简(-2x-1/4y+2z)²
化简(-2x-1/4y+2z)²
(-2x-1/4y+2z)²
=(-2x-1/4y)²+2(-1/2x-1/4y)z+4z²
=4x²-xy+1/16y²-xz-1/2yz+4z²