Réponse :
Explications étape par étape
Bonsoir
f(x) = (2x - 13)(2x - 7)
Developper :
f(x) = 4x^2 - 14x - 26x + 91
f(x) = 4x^2 - 40x + 91
f(x) = 3x(3x - 1) + (3x - 1)(x + 3)
Developper :
f(x) = 9x^2 - 3x + 3x^2 + 9x - x - 3
f(x) = 12x^2 + 5x - 3
Factoriser :
f(x) = (3x - 1)(3x + x + 3)
f(x) = (3x - 1)(4x + 3)
f(x) = (2x + 1)^2 - (3x - 1)(2x + 1)
Developper :
f(x) = 4x^2 + 4x + 1 - (6x^2 + 3x - 2x - 1)
f(x) = 4x^2 - 6x^2 + 4x - x + 1 + 1
f(x) = -2x^2 + 3x + 2
Factoriser :
f(x) = (2x + 1)(2x + 1 - 3x + 1)
f(x) = (2x + 1)(-x + 2)
f(x) = (2 + x)(1 - x) - 2x(x - 1)
Developper :
f(x) = 2 - 2x + x - x^2 - 2x^2 + 2x
f(x) = -3x^2 + x + 2
Factoriser :
f(x) = (2 + x)(1 - x) + 2x(1 - x)
f(x) = (1 - x)(2 + x + 2x)
f(x) = (1 - x)(3x + 2)
f(x) = (x - 1)^2 - 9
Developper :
f(x) = x^2 - 2x + 1 - 9
f(x) = x^2 - 2x - 8
Factoriser :
f(x) = (x - 1 - 3)(x - 1 + 3)
f(x) = (x - 4)(x + 2)