题目内容
(1) (2)
( 3 ) ( 4 ) x2+3x+2
( 3 ) ( 4 ) x2+3x+2
(1)(a-3)(a-4), (2)(x-4y)2, ( 3 ) (2m+3n)(2m-3n), ( 4 ) (x+1)(x+2)
(1)=(a-3)2-(a-3)=(a-3)(a-4)
(2)=(x-4y)2
( 3 )=(2m+3n)(2m-3n)
( 4 ) x2+3x+2=(x+1)(x+2)
(2)=(x-4y)2
( 3 )=(2m+3n)(2m-3n)
( 4 ) x2+3x+2=(x+1)(x+2)
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