Question 1035204
Factor by grouping: 
4m^2-8m-5
rewrite the -8m as:
4m^2 +2m-10m -5
group:
(4m^2+2m)+ (-10m -5)
2m(2m+1)-(10m+5)
2m(2m+1)-5(2m+1)
(2m-5)(2m+1)