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下列多项式中,能用公式法分解因式的是( ) A.x2-xy B.x2+
下列多项式中,能用公式法分解因式的是( ) A.x2-xy B.x2+
下列多项式中,能用公式法分解因式的是(
)
A
.
x
2
-
xy
B.x
2
+
xy C.x
2
+
y
2
D.x
2
-
y
2
答案
D
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