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(2x +3y)² = (2x)² + 2(2x)(3y) + (3y)²
= 4x² + 12xy + 9y²
(5x - 3y)² = (5x)² - 2(5x)(3y) + (3y)²
= 25x² - 30xy + 9y²
Espero que te sea de ayuda, gracias y no te olvides de calificar