Bonjour,
(2a + 7)²
= 4a² + 28a + 49
9a² - 36
= (3a + 6) (3a - 6)
(3a + 8) (a + 5)
= 3a² + 15a + 8a + 40
= 3a² + 23a + 40
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Bonjour,
(2a + 7)²
= 4a² + 28a + 49
9a² - 36
= (3a + 6) (3a - 6)
(3a + 8) (a + 5)
= 3a² + 15a + 8a + 40
= 3a² + 23a + 40