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数学
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分解因式:
(1)9(2a+3b)
2
-4(3a-2b)
2
(2)2a(a+b)-(a+b)
2
人气:369 ℃ 时间:2019-10-19 13:40:27
解答
(1)9(2a+3b)
2
-4(3a-2b)
2
,
=[3(2a+3b)+2(3a-2b)][3(2a+3b)-2(3a-2b)],
=13b(12a+5b);
(2)2a(a+b)-(a+b)
2
,
=(a+b)(2a-a-b),
=(a+b)(a-b).
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