## Answer :

[tex](2c - 8d) (5c -10d)[/tex]

[tex]this \\ is \\ because...[/tex]

[tex]2c*5c=10c^2[/tex]

[tex]2c * -10d=-20cd \\ -8d*5c=-40cd \\ -20cd-40cd=-60cd[/tex]

[tex]-8d * -10d = 80d[/tex]

[tex](2c - 8d) (5c -10d)[/tex]

[tex]this \\ is \\ because...[/tex]

[tex]2c*5c=10c^2[/tex]

[tex]2c * -10d=-20cd \\ -8d*5c=-40cd \\ -20cd-40cd=-60cd[/tex]

[tex]-8d * -10d = 80d[/tex]