Apply the distributive property to factor out the greatest common factor of all three terms. 10a-25+5b

5 (2a - 5 + b)

Step-by-step explanation:

10a = 2 · 5 · a

-25 = - 5 · 5

5b = 5 · b

GCF (10a, - 25, 5b) = 5

The distributive property: a (b + c) = ab + ac

Therefore

10a - 25 + 5b = 5 · 2a - 5 · 5 + 5 · b = 5 · (2a - 5 + b)