(2x2-3xy+4y2)+(x2+2xy-3y2)化简(要有过程)
3个回答
原式=(2x²-3xy+4y²)+(x²+2xy-3y²)
=(2x²+x²)+(-3xy+2xy)+(4y²-3y²)
=3x²-xy+y²
是合并同类项.
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