1、已知|2x-3y+2|+(2y-6)²=0,则其中x的值为______________2、已知代数式3x²-4x+6的值为9,则6x²-8x的值为_________________(要解析的过程,

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1、已知|2x-3y+2|+(2y-6)²=0,则其中x的值为______________2、已知代数式3x²-4x+6的值为9,则6x²-8x的值为_________________(要解析的过程,

(1)填:3.5
根据非负数之和为0得
2y-6=0
2x-3y+2=0
解得
y=3
2x-9+2=0得x=3.5
(2)填:6
3x²-4x+6=9
3x²-4x=3
2(3x²-4x)=6x²-8x=6

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