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Math

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Find the product.

(5a+2)³

  • Math -

    do 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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