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Bastien62232
@Bastien62232
April 2019
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URGENT POUR DEMAIN SIL VOUS PLAIT !!!!!
1) 25yau carré + 30y + 9 = (...) au carré = (...)au carré + 2 *...*...+...au carré
= (...+...)au carré
2) 49a au carré - 28a + 4 = (...)au carré - 2 *...*...+...au carré
= (...-...) au carré
3) 9t au carré - 121 = (....) au carré - (....) au carré
= (....-.....)(....+.....)
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1) 25y² + 30y + 9 = (5y)² + 2 * 5y * 3 + 3² = (5y + 3)²
2) 49a² - 28² + 4 = (7a)² - 2 * 7a * 2 = (7a - 2)²
3) 9t² - 121 = (3t)² - 11² = (3t - 11)(3t + 11)
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2) 49a² - 28² + 4 = (7a)² - 2 * 7a * 2 = (7a - 2)²
3) 9t² - 121 = (3t)² - 11² = (3t - 11)(3t + 11)