Question
Aidez moi merci!!^^
Developper et reduire:
A= (7x+4)²+(9x-3)²
B= 9x(x-9)-(7x+2)²
C= (5x-6)(3x-7)-(5x-6)(5x+6)
Merci^^:)
Developper et reduire:
A= (7x+4)²+(9x-3)²
B= 9x(x-9)-(7x+2)²
C= (5x-6)(3x-7)-(5x-6)(5x+6)
Merci^^:)
Asked by: USER2386
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Answer (161)
Salut,
voici tes calculs corrigés.
A = (7x + 4)² + (9x - 3)²
A = 49x² + 56x + 16 + 81x² - 54x + 9
A = 130x² + 2x + 25
B = 9x(x - 9) - (7x + 2)²
B = 9x² - 81x - 49x² + 28x - 4
B = -40x² - 53x - 4
C = (5x - 6)(3x - 7) - (5x - 6)(5x + 6)
C = 15x² - 35x - 18x + 42 - 25x² + 36
C = -10x² - 53x + 38
Si tu as des questions, je reste dispo. A+
voici tes calculs corrigés.
A = (7x + 4)² + (9x - 3)²
A = 49x² + 56x + 16 + 81x² - 54x + 9
A = 130x² + 2x + 25
B = 9x(x - 9) - (7x + 2)²
B = 9x² - 81x - 49x² + 28x - 4
B = -40x² - 53x - 4
C = (5x - 6)(3x - 7) - (5x - 6)(5x + 6)
C = 15x² - 35x - 18x + 42 - 25x² + 36
C = -10x² - 53x + 38
Si tu as des questions, je reste dispo. A+