¿Esta bien resuelto este problema de producto de binomio conjugado doy 5 estrellas (:?

Mira lo que tienes que hacer es lo siguiente: agrupas los dos primeros y los dos ultimos y sacar factor comun osea te quedaria asi 5h(2h-3k) -2m(2h-3k) de la segunda el signo del parentesis es - ya que si multiplicas te quedan los mismos dos ultimos factores.....luego de eso si te fijas tiens un termino que se repite que es (2h-3k) o sea con eso vuelves a sacar factor comun y te queda... (2h-3k) (5h-2m).......esa es tu respuesta espero te sirva.

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