Num Num Cookie Monster

Factorize: x^2+8x+10 i just solved it but i don't know if the process is correct

Apackage of bacon holds 15 strips of bacon. the pancake house uses 17 packages of bacon in the morning and 21 packages in the afternoon. how many more strips were used in the afternoon than the morning?

Of four points are collinear, they are also coplanar