化简:3a-{-2b[a-(4a+3b)]}
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化简:3a-{-2b[a-(4a+3b)]}
化简:3a-{-2b[a-(4a+3b)]}
化简:3a-{-2b[a-(4a+3b)]}
3a-{-2b[a-(4a+3b)]}
=3a-{-2b[a-4a-3b]}
=3a-{-2b[-3a-3b]}
=3a-{6ab+3b²}
=3a-6ab-3b²
3a-6ab-6b的平方 (=3a-{-2b[-3a-3b]}=3a-{6ab+3b²})-----楼上,你错了~
=(2x-3y)的3次方+(3x-2y-5x+5y)乘以((3x-2y)的平方+(3x-2y)(5x-5y)+(5x-5y)的平方)
=(2x-3y)的3次方+(-2x+3y)((3x-2y)的平方+(5x-5y)(8x-7y))
=(2x-3y)((2x-3y)的平方-(3x-2y)的平方+(5x-5y)(8x-7y))
=(2x-3y)((-x-y)(5x-5y)-(5...
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=(2x-3y)的3次方+(3x-2y-5x+5y)乘以((3x-2y)的平方+(3x-2y)(5x-5y)+(5x-5y)的平方)
=(2x-3y)的3次方+(-2x+3y)((3x-2y)的平方+(5x-5y)(8x-7y))
=(2x-3y)((2x-3y)的平方-(3x-2y)的平方+(5x-5y)(8x-7y))
=(2x-3y)((-x-y)(5x-5y)-(5x-5y)(8x-7y))
=(2x-3y)(5x-5y)(-9x+6y)
=15(2x-3y)(x-y)(-3x+2y)你刚才的题,好不容易打好了,居然被你又删了
收起
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