(2a+3ab)*2. solve it urgent
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(2a+ 3ab)²
=( 2a)² +(3ab)² + 2×2a×3ab
= 4a²+9a²b²+ 12a²b
= a²(4+9b²+12b)
=( 2a)² +(3ab)² + 2×2a×3ab
= 4a²+9a²b²+ 12a²b
= a²(4+9b²+12b)
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