Question 360311
am–2a–5m+10 given <br>

{{{am-2a-(5m-10)}}} manipulate -5m+10 to become -(5m-10)<br>

{{{a(m-2)-5(m-2)}}} factor out a from the first part and 5 from the second part<br>

{{{(a-5)(m-2)}}} combine a and -5 since they have a common multiple of (m-2)<br>

If you use the FOIL method to multiply the two factors out, it will be same as the given polynomial!<br>

I hope this helps!<br>