已知|x+3|=-(2x+y)^2,求3/4x^2-3y+1/4x^2+y的值.

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已知|x+3|=-(2x+y)^2,求3/4x^2-3y+1/4x^2+y的值.
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已知|x+3|=-(2x+y)^2,求3/4x^2-3y+1/4x^2+y的值.
已知|x+3|=-(2x+y)^2,求3/4x^2-3y+1/4x^2+y的值.

已知|x+3|=-(2x+y)^2,求3/4x^2-3y+1/4x^2+y的值.
|x+3|=-(2x+y)^2
x+3=0
2x+y=0
x=-3
y=6
3/4x^2-3y+1/4x^2+y
=x^2-2y
=9-12
=-3
希望对你能有所帮助.

|x+3|=-(2x+y)^2
|x+3|+(2x+y)^2=0
x=-3 y=6
3/4x^2-3y+1/4x^2+y
=x^2-2y
=(-3)^2-2*6
=9-12
=-3

|x+3|=-(2x+y)^2
x+3=0
2x+y=0
x=-3
y=6
3/4x^2-3y+1/4x^2+y
=x^2-2y
=9-12
=-3

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