Question

cubo de un binomio
$(x {}^{2} + 3x) {}^{3}$
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Answer 1

$(x^2+3x)^3 = (x^2+3x)^2 * (x^2+3x)$

$= (x^4+9x^2+6x^3) * (x^2 + 3x)$

$= (x^6+3x^5+9x^4+27x^3+6x^5+18x^4)$

$= x^6 + 9x^5 + 27x^4 + 27x^3$

$= x^3(x^3+9x^2+27x+27)$

$= x^3(x^3+9*(x^2+3x+3)$

Espero haberte ayudado.