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因式分解,要有过程哦!
3个回答
展开全部
(1)原式=(5x)²-(4y)²
=(5x+4y)(5x-4y)
(2) 原式=(a-b)(x-y)+(a-b)(x+y)
=(a-b)(x-y+x+y)
=(a-b)×2x
=2x(a-b)
=(5x+4y)(5x-4y)
(2) 原式=(a-b)(x-y)+(a-b)(x+y)
=(a-b)(x-y+x+y)
=(a-b)×2x
=2x(a-b)
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