12. (а- 2b)^2 + За – 6b
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Answer:
Step-by-step explanation:
(a - 2b)² + 3a - 6b
= a² - 2.a.2b + (2b)² + 3a - 6b
= a² - 4ab + 4b² + 3a - 6b(Answer)
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Answered by
0
Answer:
a² + 4b² - ab - 6b
Step-by-step explanation:
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