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=4a²+12ab+9b²
( 2a + 3b)²
[(2a)² + 2 (2a * 3b) + (3b)²]
[4a² + 2 (6ab) + 9b²]
[4a² + 12ab + 9b²]
4a² + 12ab + 9b²
Respuesta.
4a² + 12ab + 9b²