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数学
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分解因式:(3a-4b)(7a-8b)-(11a-12b)(8b-7a).
人气:202 ℃ 时间:2020-04-03 09:37:19
解答
(3a-4b)(7a-8b)-(11a-12b)(8b-7a),
=(3a-4b)(7a-8b)+(11a-12b)(7a-8b),
=(7a-8b)(3a-4b+11a-12b),
=(7a-8b)(14a-16b),
=2(7a-8b)
2
.
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