整式化简求值,请在十分钟内帮我解答出来已知xy=2,x+y=3,求(3xy+10y)+[5x-(2xy+2y-3x)]的值

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整式化简求值,请在十分钟内帮我解答出来已知xy=2,x+y=3,求(3xy+10y)+[5x-(2xy+2y-3x)]的值
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整式化简求值,请在十分钟内帮我解答出来已知xy=2,x+y=3,求(3xy+10y)+[5x-(2xy+2y-3x)]的值
整式化简求值,请在十分钟内帮我解答出来
已知xy=2,x+y=3,求(3xy+10y)+[5x-(2xy+2y-3x)]的值

整式化简求值,请在十分钟内帮我解答出来已知xy=2,x+y=3,求(3xy+10y)+[5x-(2xy+2y-3x)]的值

原式=3xy+10y+5x-2xy-2y+3x=xy+8(x+y)=2+8*3=26

(3xy+10y)+[5x-(2xy+2y-3x)]=3xy+10y+5x-2xy-2y+3x
=xy+8x+8y
=xy+8(x+y)
把已知xy=2,x...

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(3xy+10y)+[5x-(2xy+2y-3x)]=3xy+10y+5x-2xy-2y+3x
=xy+8x+8y
=xy+8(x+y)
把已知xy=2,x+y=3,代入得
=2+8*3=26

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