分解因式:(3a-4b)(7a-8b)-(11a-12b)(8b-7a).

问题描述:

分解因式:(3a-4b)(7a-8b)-(11a-12b)(8b-7a).

(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