Answer:
Explanation:
a. N^2 - 8N + 16 = (N - 4)^2
b. B^2 - 16B + 64 = (B - 8)^2
c. 9a^2 - 42a + 49 = (3a - 7)^2
d. 3a^2 + 6ab + 3b^2 = 3(a^2 + 2ab + b^2) = 3(a + b)^2
e. 36w^2 - 12w + 1 = (6w - 1)^2
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