Bonjour,
a. (x + 10)² = x + 20x + 100.
b. (x + 9) (x - 9) = x² - 81
c. x² + 16x + 64 = (x + 8)²
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Bonjour,
a. (x + 10)² = x + 20x + 100.
b. (x + 9) (x - 9) = x² - 81
c. x² + 16x + 64 = (x + 8)²