Bonjour,
a) x² - 121 = (x - 11) (x + 11)
b) 9y² + 12y + 4 = (3y + 2)²
c) x² + 169 - 26x = (x - 13)²
d) 144x + 144x² + 36 = 36 (2x + 1)²
e) (3x + 1)² - (2x)² = (3x + 1 - 2x) (3x + 1 + 2x) = (x + 1) (5x + 1)
f) 9t² - 24t + 16 = (3t - 4)²
g) - 22x + 121x² + 1 = (11x - 1)²
h) (x + 1)² - 9 = (x + 1 - 3) (x + 1 + 3) = (x - 2) (x + 4).
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Bonjour,
a) x² - 121 = (x - 11) (x + 11)
b) 9y² + 12y + 4 = (3y + 2)²
c) x² + 169 - 26x = (x - 13)²
d) 144x + 144x² + 36 = 36 (2x + 1)²
e) (3x + 1)² - (2x)² = (3x + 1 - 2x) (3x + 1 + 2x) = (x + 1) (5x + 1)
f) 9t² - 24t + 16 = (3t - 4)²
g) - 22x + 121x² + 1 = (11x - 1)²
h) (x + 1)² - 9 = (x + 1 - 3) (x + 1 + 3) = (x - 2) (x + 4).