What is the formula of a+b whole cube and a square +b square give these two formulas plzzzzzzz fasttttt

2
by sofia9

2016-03-16T14:08:21+05:30

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(a+b)^3=a^3+b^3+3ab(a+b)
there is no formulas for a^2+b^2
2016-03-20T17:46:59+05:30

1. (a + b)³ = a³ + b³ + 3ab(a + b)

We Can Derive it by =

(a + b)³ = (a + b) (a + b)  (a + b)
= (a² + b² + 2ab) (a + b)
= a³ + b³ + 2a²b + 2ab² + a²b + ab²
= a³ + b³ + 3a²b + 3ab²
= a³ + b³ + 3ab(a + b) -------[Taking 3ab Common]

2. a² + b² = [ There is No Formula For It but There is Formula for ]
The Following

3. a² - b² = (a + b) (a - b)
4. (a + b)²= (a² + b² + 2ab)

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