1-3(x-1/2y²)+(-x+1/2y²)
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1-3(x-1/2y²)+(-x+1/2y²)
=1-3x+3/2y²-x+1/2y²
=1-4x+2y²
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=1-3x+3/2y²-x+1/2y²
=1-4x+2y²
不懂可追问,有帮助请采纳,谢谢!
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1-3(x-1/2y²)+(-x+1/2y²)
=1-3(x-1/2y²)-(x-1/2y²)
=1-3(x-1/2y²)-1(x-1/2y²)
=1-4(x-1/2y²)
=2y²-4x+1
=1-3(x-1/2y²)-(x-1/2y²)
=1-3(x-1/2y²)-1(x-1/2y²)
=1-4(x-1/2y²)
=2y²-4x+1
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解:1-3(x-1/2y²)+(-x+1/2y²)
=1-3(x-1/2y²)-(x-1/2y²)
=1-4(x-1/2y²)
=2y²-4x+1
=1-3(x-1/2y²)-(x-1/2y²)
=1-4(x-1/2y²)
=2y²-4x+1
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