Answer:
[tex] {y}^{2} - 14y + 45 \\ \\ {y}^{2} - 9 y + 5y - 45 \\ \\ y(y - 9) - 5(y - 9) \\ \\ (y - 5)(y - 9)[/tex]
Here's the solution :
[tex] {y}^{2} - 4y+ 45[/tex]
[tex] {y}^{2} - 9y - 5y + 45[/tex]
[tex]y(y - 9) - 5(y - 9)[/tex]
[tex](y - 5)(y - 9)[/tex]
therefore, the roots are 5 and 9
