Question

(9u+w)^2
(use foil).................

Answer 1

Explanation:

(9u + w)(9u + w)

f: 9u * 9u = 81 u^2

o: 9u * w

i: 9u* w

l: w * w = w^2

Result

81u^2 + 9uw + 9uw + w^2

81u^2 + 18uw + w^2