计算2x(1-3x)-(2x-1)(4-3x)4x²+y²=(2x-y)²+————
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计算2x(1-3x)-(2x-1)(4-3x)4x²+y²=(2x-y)²+————
计算2x(1-3x)-(2x-1)(4-3x)
4x²+y²=(2x-y)²+————
计算2x(1-3x)-(2x-1)(4-3x)4x²+y²=(2x-y)²+————
2x(1-3x)-(2x-1)(4-3x)
=2x-6x²-(8x-6x²-4+3x)
=2x-6x²-11x+6x²+4
=-9x+4
4x²+y²=(2x-y)²+4xy
2x(1-3x)-(2x-1)(4-3x)
=2x(6x²+x-1)(4-3x)
=2x(24x²+4x-4-18x³-3x²+3x)
=2x(21x²-18x³+7x-4)
=-36x^4+42x³+14x²-8x
4x²+y²=(2x-y)²+4xy
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