Bonjour,
a. 25 - x² = 5² - x² = (-x + 5) (x + 5)
b. x² + 2x + 1 = (x + 1)²
c. 49x² - 100 = (7x)² - (10)² = (7x - 10) (7x + 10)
d. 4x² - 12x + 9 = (2x - 3)²
e. 16x² - 16 = (4x - 4) (4x + 4) = 16 (x - 1) (x + 1)
f. 64 - 48x + 9x² = (3x - 8)².
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Bonjour,
a. 25 - x² = 5² - x² = (-x + 5) (x + 5)
b. x² + 2x + 1 = (x + 1)²
c. 49x² - 100 = (7x)² - (10)² = (7x - 10) (7x + 10)
d. 4x² - 12x + 9 = (2x - 3)²
e. 16x² - 16 = (4x - 4) (4x + 4) = 16 (x - 1) (x + 1)
f. 64 - 48x + 9x² = (3x - 8)².