How do you use pascals triangle to expand ${(x^{3} + 5 y)}^{4}$ $(x^3 + 5y)^4$ ?

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Answer 1 · 2015-09-17T02:14:18

$x^{12} + 20 x^{9} y + 150 x^{6} y^{2} + 500 x^{3} y^{3} + 625 y^{4}$ $x^12+20x^9y+150x^6y^2+500x^3y^3+625y^4$

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How do you use pascals triangle to expand (x3+5y)4 (x^3 + 5y)^4?