(5a+b)²-2(5a+b)(5a+b)怎么写

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(5a+b)²-2(5a+b)(5a+b)怎么写(5a+b)²-2(5a+b)(5a+b)怎么写(5a+b)²-2(5a+b)(5a+b)怎么写(5a+b)²-

(5a+b)²-2(5a+b)(5a+b)怎么写
(5a+b)²-2(5a+b)(5a+b)怎么写

(5a+b)²-2(5a+b)(5a+b)怎么写
(5a+b)²-2(5a+b)(5a+b)=5a+b)²-2(5a+b)²=-(5a+b)²