This is the formula:
(a3)+(b3)=(a+b)(a2-ab+b2)
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It could be a^3 + b or (a + b)^3, depending on the context.
It is a*a + b*b + c*c
a square minus b square
If: a = 2b+c Then: a-c = 2b And: b = (a-c)/2
2A plus 3B times 2A - 3B = 4A2 - 9B2; this is an example of the general formula (a + b)(a - b) = a2 - b2.