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Verify it as fast as you can​

Verify it as fast as you can​-example-1
User Arsenm
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Answer:

(a+6)²

by identity (a+b)²=a²+2ab+b²

(a+6)²= a²+ 2×a×6 + 6²

= a²+ 12a + 36

(2a)²+5a = 4a²+5a

User Simon Gibbs
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