题目
题型:解答题难度:一般来源:期末题
答案
=[3(a+b)]2﹣(a﹣b)2,
=[3(a+b)+(a﹣b)][3(a+b)﹣(a﹣b)],
=(4a+2b)(2a+4b),
=4(2a+b)(a+2b).
核心考点
举一反三
(1)2a2b+4ab﹣6b
(2)16x4﹣8x2y2+y4
(1)2x2y+4xy2
(2)(x2﹣2)(2y2﹣1)
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