Question

AYUDA urgente por favor:
7. x^2-9/x+3 * x^2+x/x(x-3)

Answer 1

$7x^2-\frac{9}{x}+3x^2+\frac{x}{x}\left(x-3\right)=10x^2+x-\frac{9}{x}-3 x^2-\frac{9}{x}+3x^2+\frac{x}{x}\left(x-3\right) =7x^2-\frac{9}{x}+3x^2+1\cdot \left(x-3\right) =7x^2-\frac{9}{x}+3x^2+x-3 =10x^2+x-\frac{9}{x}-3$