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Sagot :

FAMILYS

Bonjour,

Ces expressions sont sous la forme (a + b)(a - b) = a² - b².

M = x² - 49

M = (x)² - (7)²

M = (x + 7)(x - 7)

N = 81 - t²

N = (9)² - (t)²

N = (9 + t)(9 - t)

P = 16x² - 36

P = (4x)² - (6)²

P = (4x + 6)(4x - 6)

Q = 25 - 4y²

Q = (5)² - (2y)²

Q = (5 + 2y)(5 - 2y)

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