Question

(x+3)^3 + (x-3)^3 - 2x^3 algebra productos notables

Answer 1

$(x+3)^3+(x-3)^3-2x^3$

$=x^3+9x^2+27x+27+x^3-9x^2+27x-27+2x^3$

$=x^3+x^3-2x^3+9x^2-9x^3+27x+27x+27-27$

$9x^2-9x^2+27x+27x+27-27$

$=27x+27x+27-27$

$=54x+27-27$

=54x

espero que te ayude