For what integer $$\(a\)$$ is $$\(x^{13}+x+90\)$$ divisible by $$\(x^{2}-x+a\)$$ as polynomials?

Ky cycles from his office to a meeting and back again. The travel graph shows his time at the meeting and his journey back. W...

From the list of numbers，write down （b）a square number ［1］