поделите.49-14x+x^2/7x^2-x^3 : 49-x^2/18x^2

Question

поделите.49-14x+x^2/7x^2-x^3 : 49-x^2/18x^2

Answer 1

(x-7)²/x²(7-x)/49-x²/18x²

-(7-x)²/x²(7-x)/49-x²/18x²

-(7-x)²/x²/(7+x)(7-x)

-(7-x)18x²/x²(7-x)(7+x)

x=-18/7-x