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January 29, 2015

January 29, 2015

Posted by **Mimi** on Tuesday, May 3, 2011 at 4:03am.

(5a+2)³

- Math -
**Damon**, Tuesday, May 3, 2011 at 4:25amdo you know pascal's triangle or other ways of doing binomial coefficients?

row 3

1 3 3 1

so

(x+y)^3 = 1 x^3 + 3 x^2 y + 3 x y^2 + 1 y^3

here x = 5 a

y = 2

so

125 a^3 + 150 a^2 + 30 a + 8

check my arithmetic

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