单项式5X*2Y,3X*2Y*2,4YX*2的和为
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单项式5X*2Y,3X*2Y*2,4YX*2的和为
单项式5X*2Y,3X*2Y*2,4YX*2的和为
单项式5X*2Y,3X*2Y*2,4YX*2的和为
5X*2Y+3X*2Y*2+4YX*2
=10XY+6XY+8XY
=(10+6+8)XY
=24XY
24XY