代数式2x²+6xy+9y²-2x+1的值为0,求x=,y=
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代数式2x²+6xy+9y²-2x+1的值为0,求x=,y=
代数式2x²+6xy+9y²-2x+1的值为0,求x=,y=
代数式2x²+6xy+9y²-2x+1的值为0,求x=,y=
代数式2x²+6xy+9y²-2x+1=(x+3y)²+(x-1)²=0
x=1
y=-1/3
2x²+6xy+9y²-2x+1=(x+3y)²+(x-1)²=0
x+3y=0 x-1=0 x=1 y=-1/3