Mathematics, 25.07.2021 14:00 claplo9141
(a + b)³-(a - b)³- 6a²b
Answers: 1
![(a+b)^3=a^3+b^3+3ab(a+b)\\(a-b)^3=a^3-b^3-3ab(a-b)\\(a+b)^3-(a-b)^3-6a^2b\\=a^3+b^3+3ab(a+b)-[a^3-b^3-3ab(a-b)]-6a^2b\\=2b^3](/tpl/images/2428/9710/2d3a2.png)
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