(a+b)²=a²+2ab+b²
(a-b)²=a²-2ab+b²
(a+b)³=a³+3a²b+3ab²+b³
(a-b)³=a³-3a²b+3ab²-b³
(2a-3b)²=4a²-12ab+9b²
(7a+4c)²=49a²+56ac+16c²
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(a+b)²=a²+2ab+b²
(a-b)²=a²-2ab+b²
(a+b)³=a³+3a²b+3ab²+b³
(a-b)³=a³-3a²b+3ab²-b³
(2a-3b)²=4a²-12ab+9b²
(7a+4c)²=49a²+56ac+16c²