Answer:

first photo shows the solution and the second photo is part of an explanation

sa foil method, i-didistribute or imumultiply mo muna ang unang number sa kabila tulad ng nasa photos. same process sa pangalawang number.

MAKE SURE NA SUSUNDIN ANG RULE NG MULTIPLICATION OF INTEGERS wherein pag pinag multiply mo ang NEGATIVE x NEGATIVE = POSITIVE. after that, pagsamahin lang ang LIKE TERMS -7y-3y to get the final answer

hope this helps...

Multiply each term in the first bracket by each in the second.

This will give 4 terms, collect any like terms together for the final answer.