Answer:
Step-by-step explanation:
121 a^2
(11a)² - 2.11a.4b - (4b)²
( 11a - 4b )² answer
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Answer:
Step-by-step explanation:
121 a^2
Answer:
(11a)² - 2.11a.4b - (4b)²
( 11a - 4b )² answer