Bonjour,
A = (x + 2)²
A = x² + 4x + 4
B = (y - 3)²
B = y² - 6y + 9
C = (3a + 4)²
C = 9a² + 24a + 16
D = (7 - 2b)²
D = 49 - 28b + 4b²
D = 4b² - 28b + 49.
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Bonjour,
A = (x + 2)²
A = x² + 4x + 4
B = (y - 3)²
B = y² - 6y + 9
C = (3a + 4)²
C = 9a² + 24a + 16
D = (7 - 2b)²
D = 49 - 28b + 4b²
D = 4b² - 28b + 49.