Respuesta :
(12x^2 - 11y^2 - 13x) - (5x^2 - 14y^2 - 9x) =
= 12x^2 - 11y^2 - 13x - 5x^2 + 14y^2 + 9x
= 12x^2 - 5x^2 - 11y^2 + 14y^2 - 13x + 9x
= 7x^2 + 3y^2 - 4x
= 12x^2 - 11y^2 - 13x - 5x^2 + 14y^2 + 9x
= 12x^2 - 5x^2 - 11y^2 + 14y^2 - 13x + 9x
= 7x^2 + 3y^2 - 4x
Answer:
has to be option A
Step-by-step explanation:
Just tried in edg