下列因式分解正确的是( ) A.x 2 +y 2 =(x+y)(x-y) B.x 2 -y 2 =(x+y)(x一y) C.x
下列因式分解正确的是()A.x2+y2=(x+y)(x-y)B.x2-y2=(x+y)(x一y)C.x2+y2=(x+y)2D.x2-y2=(x-y)2...
下列因式分解正确的是( ) A.x 2 +y 2 =(x+y)(x-y) B.x 2 -y 2 =(x+y)(x一y) C.x 2 +y 2 =(x+y) 2 D.x 2 -y 2 =(x-y) 2
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