4道因式分解.①4x²+2x+y+y²+4xy②x²-y²+4y-1③16x²-24xy-1+9y²④4x²-16xy+4y²-6x+6y
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![4道因式分解.①4x²+2x+y+y²+4xy②x²-y²+4y-1③16x²-24xy-1+9y²④4x²-16xy+4y²-6x+6y](/uploads/image/z/14465567-47-7.jpg?t=4%E9%81%93%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3.%E2%91%A04x%26%23178%3B%2B2x%2By%2By%26%23178%3B%2B4xy%E2%91%A1x%26%23178%3B-y%26%23178%3B%2B4y-1%E2%91%A216x%26%23178%3B-24xy-1%2B9y%26%23178%3B%E2%91%A34x%26%23178%3B-16xy%2B4y%26%23178%3B-6x%2B6y)
4道因式分解.①4x²+2x+y+y²+4xy②x²-y²+4y-1③16x²-24xy-1+9y²④4x²-16xy+4y²-6x+6y
4道因式分解.
①4x²+2x+y+y²+4xy
②x²-y²+4y-1
③16x²-24xy-1+9y²
④4x²-16xy+4y²-6x+6y
4道因式分解.①4x²+2x+y+y²+4xy②x²-y²+4y-1③16x²-24xy-1+9y²④4x²-16xy+4y²-6x+6y
①4x²+2x+y+y²+4xy
= 4x²+4xy+y²+2x+y
= (2x+y)²+2x+y
= (2x+y)(2x+y+1)
②抄错题了,应为x²-4y²+4y-1
x²-4y²+4y-1
= x²-(2y-1)²
= (x+2y-1)(x-2y+1)
③16x²-24xy-1+9y²
= 16x²-24xy+9y²-1
= (4x-3y)²-1
= (4x-3y+1)(4x-3y-1)
④抄错题了,应为4x²-8xy+4y²-6x+6y
4x²-8xy+4y²-6x+6y
=2(x²-2xy+y²)-6(x-y)
= 2(x-y)²-6(x-y)
= 2(x-y)(x-y-3)
①4x²+2x+y+y²+4xy
=4x²+4xy+y²+2x+y
=(2x+y)²+(2x+y)
\(2x+y)(2x+y+1)
②x²-y²+4y-1
不能分解
换一个x²-y²+4y-4
=x²-(y-2)²
=(x+y...
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①4x²+2x+y+y²+4xy
=4x²+4xy+y²+2x+y
=(2x+y)²+(2x+y)
\(2x+y)(2x+y+1)
②x²-y²+4y-1
不能分解
换一个x²-y²+4y-4
=x²-(y-2)²
=(x+y-2)(x-y+2)
③16x²-24xy-1+9y²
=16x²-24xy+9y²-1
=(4x-3y)²-1
=(4x-3y+1)(4x-3y-1)
④4x²-16xy+4y²-6x+6y
这个题目似乎也有问题
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