4-7x^2/2-x - 6x^2/2-x при x=-3/4

Question

4-7x^2/2-x - 6x^2/2-x при x=-3/4

Answer 1

(4-7x^2)/(2-x) - 6x^2/(2-x)

(13x^2-4)/(x-2)

при x=-3/4

(13(-3/4)^2-4)/(-3/4-2)=-53/44