Answer:
10a + 10b
Explanation:
Using the method of FOIL (First Outside Inside Last) write this in expanded form:
⇒ First multiply 10 with "a"
=> 10 (a + b)
⇒ Then multiply 10 with "b"
=> 10 (a + b)
⇒ Combine both together:
=> 10a + 10b
Hope this helps!