Bonjour
A = (2x - 1)² - 4x (2x + 3)
A = 4x² - 4x + 1 - 8x² - 12x
A = - 4x² - 16x + 1
B = (3x - 2) (x + 1) + (x + 2)²
B = 3x² + 3x - 2x - 2 + x² + 4x + 4
B = 4x² + 5x + 2.
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Bonjour
A = (2x - 1)² - 4x (2x + 3)
A = 4x² - 4x + 1 - 8x² - 12x
A = - 4x² - 16x + 1
B = (3x - 2) (x + 1) + (x + 2)²
B = 3x² + 3x - 2x - 2 + x² + 4x + 4
B = 4x² + 5x + 2.