>
数学
>
因式分解
(1)4-12(x-y)+9(x-y)
2
;
(2)2a(x
2
+1)
2
-8ax
2
.
人气:349 ℃ 时间:2019-12-13 11:36:56
解答
(1)4-12(x-y)+9(x-y)
2
,
=2
2
-2×2×3(x-y)+[3(x-y)]
2
,
=[2-3(x-y)]
2
,
=(2-3x+3y)
2
;
(2)2a(x
2
+1)
2
-8ax
2
,
=2a[(x
2
+1)
2
-4x
2
],
=2a(x
2
+1-2x)(x
2
+1+2x),
=2a(x-1)
2
(x+1)
2
.
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