Bonjour
9x² - (x - 5)²
= (3x - x + 5) (3x + x - 5)
= (2x + 5) (4x - 5)
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Bonjour
9x² - (x - 5)²
= (3x - x + 5) (3x + x - 5)
= (2x + 5) (4x - 5)