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FoudreNoir
@FoudreNoir
May 2019
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Bonjour exercice de développement Bonne chance
(3x+4)²
(2x-8)²
(5x-2)(5x+2)
(-2x-4)²
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loulakar
Verified answer
(3x + 4)^2 = (3x)^2 + 2 * 4 * 3x + (4)^2
(3x + 4)^2 = 9x^2 + 24x + 16
(2x - 8)^2 = (2x)^2 + 2 * (-8) * 2x + (-8)^2
(2x - 8)^2 = 4x^2 - 32x + 64
(5x - 2)(5x + 2) = (5x)^2 - (2)^2
(5x - 2)(5x + 2) = 25x^2 - 4
(-2x - 4)^2 = (-2x)^2 + 2 * (-4) * (-2x) + (-4)^2
(-2x - 4)^2 = 4x^2 + 16x + 16
2 votes
Thanks 1
loulakar
Merci je sais me servir d'un ordinateur sauf que là je suis sur mon téléphone
loulakar
Sur un clavier d'ordinateur il existe même une touche ² pas besoin de passer par ^2 pour faire un exposant de 2
loulakar
Merci pour l'info !
Commentaires
Verified answer
(3x + 4)² = 3x * 3x + 3x * 2 * 4 + 4² = 9x² + 24x + 16
(2x - 8)² = 2x * 2x + 2x * - 8 * 2 + (-8)² = 4x² - 32x + 64
(5x - 2)(5x + 2) = 5x² - 2² = 25x² - 4
(-2x - 4)² = (-2x)² + -2x * -4 * 2 + (-4)² = 4x² + 16x + 16
2 votes
Thanks 1
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Bonjour je recherche le titre d'un film ou le prince serais un mechant Le prof a dit que on la tout deja vue Je suis en seconde
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Verified answer
(3x + 4)^2 = (3x)^2 + 2 * 4 * 3x + (4)^2(3x + 4)^2 = 9x^2 + 24x + 16
(2x - 8)^2 = (2x)^2 + 2 * (-8) * 2x + (-8)^2
(2x - 8)^2 = 4x^2 - 32x + 64
(5x - 2)(5x + 2) = (5x)^2 - (2)^2
(5x - 2)(5x + 2) = 25x^2 - 4
(-2x - 4)^2 = (-2x)^2 + 2 * (-4) * (-2x) + (-4)^2
(-2x - 4)^2 = 4x^2 + 16x + 16
Verified answer
(3x + 4)² = 3x * 3x + 3x * 2 * 4 + 4² = 9x² + 24x + 16(2x - 8)² = 2x * 2x + 2x * - 8 * 2 + (-8)² = 4x² - 32x + 64
(5x - 2)(5x + 2) = 5x² - 2² = 25x² - 4
(-2x - 4)² = (-2x)² + -2x * -4 * 2 + (-4)² = 4x² + 16x + 16