(a+b)(a+b)(a+b) cac ban giup minh voi minh cam on a
(a+b)(a+b)(a+b) cac ban giup minh voi minh cam on a
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(a+b)(a+b)(a+b) cac ban giup minh voi minh cam on a
RI SƠ
`(a+b)(a+b)(a+b)=(a+b)³=a³+3a²b+3ab²+b³`
Eirian
(a+b)(a+b)(a+b) = `(a+b)^3`