去括号:1/2(2X²Y-3XY²+4XY-X²Y²)=?

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去括号:1/2(2X²Y-3XY²+4XY-X²Y²)=?

去括号:1/2(2X²Y-3XY²+4XY-X²Y²)=?
去括号:1/2(2X²Y-3XY²+4XY-X²Y²)=?

去括号:1/2(2X²Y-3XY²+4XY-X²Y²)=?
原式=X²Y-1.5XY²+2XY-0.5X²Y²

1/2(2X²Y-3XY²+4XY-X²Y²)
=x²y-3/2xy²+2xy-1/2x²y²