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La consigne est de factoriser l'écriture de f(x)
a)f(x)= 2x(x-7) - x²
b)f(x) = (x-1) (2x -3) + (x-1) (3x - 4)
c)f(x)=(x+2) (2x - 5) - (2x - 5) (4x - 1)
d)f(x)=3(x + 3 )² - 2 (x+3) (x-5 )
La consigne est de factoriser l'écriture de f(x)
a)f(x)= 2x(x-7) - x²
b)f(x) = (x-1) (2x -3) + (x-1) (3x - 4)
c)f(x)=(x+2) (2x - 5) - (2x - 5) (4x - 1)
d)f(x)=3(x + 3 )² - 2 (x+3) (x-5 )
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Bonjour,a) f(x) = 2x(x - 7) - x^2
f(x) = x(2x - 14 - x)
f(x) = x(x - 14)
b) f(x) = (x - 1)(2x - 3) + (x - 1)(3x - 4)
f(x) = (x - 1)(2x - 3 + 3x - 4)
f(x) = (x - 1)(5x - 7)
c) f(x) = (x + 2)(2x - 5) - (2x - 5)(4x - 1)
f(x) = (2x - 5)(x + 2 - 4x + 1)
f(x) = (2x - 5)(-3x + 3)
f(x) = 3(2x - 5)(-x + 1)
d) f(x) = 3(x + 3)^2 - 2(x + 3)(x - 5)
f(x) = (x + 3)[3(x + 3) - 2(x - 5)]
f(x) = (x + 3)(3x + 9 - 2x + 10)
f(x) = (x + 3)(x + 19)