Forum de Mathématiques: Maths-Forum

Merci bcp a toute et a tous pour ces aides! :D

ok super merci bcp ! :D a toute et a tous! :)

je sais pas quoi mettre ac c'est plusieurs version: Q(x) = (2x - 3)²+ (3 - 2x)(x - 1) - 6 + 4x = (3 - 2x)² + (3 - 2x)(x - 1) - 2(3 - 2x) = (3 – 2x)[(3 – 2x) + (x – 1) – 2] = (3 – 2x)(3 – 2x + x – 1 – 2) = (3 – 2x)(- 1x) Q(x) = (2x – 3)² + (3 - 2x)(x - 1) - 6 + 4x = (2x – 3)² - (2x - 3)(x - 1) + 2(2x...

c'est quoi la réponse de Q(x) alors svp ? vite si possible :)

je doit mettre qq'chose en plus pour Q(x) ?

(2x - 3)² = [-(-2x + 3)]² = (-1)²*(-2x + 3)² = (3 - 2x)²

Q(x) = (2x - 3)^2+ (3 - 2x)(x - 1) - 6 + 4x = (3 - 2x)² + (3 - 2x)(x - 1) - 2(3 - 2x) = (3 – 2x)[(3 – 2x) + (x – 1) – 2] = (3 – 2x)(3 – 2x + x – 1 – 2) = (3 – 2x)(- 1x) S(x) = 49x^2- 28x + 4 - (4x^2+ 28x + 49) = (7x – 2)^2 – (2x + 7)^2 = [(7x - 2) - (2x + 7)][(7x - 2) + (2x + 7)] = [7x - 2 - 2x - 7]...

stp c'est pour demain :(

stp c'est pour demain :(

Q(x) = (2x - 3)2*+ (3 - 2x)(x - 1) - 6 + 4x = (3 - 2x)² + (3 - 2x)(x - 1) - 2(3 - 2x) = (3 – 2x)[(3 – 2x) + (x – 1) – 2] = (3 – 2x)(3 – 2x + x – 1 – 2) = (3 – 2x)(- 1x) S(x) = 49x2*- 28x + 4 - (4x2*+ 28x + 49) = (7x – 2)2* – (2x + 7)2* = [(7x - 2) - (2x + 7)][(7x - 2) + (2x + 7)]* = [7x - 2 - 2x - 7...

a ok super merci ! :D

et Q(x) c'est bon ?

Q(x) = (2x - 3)2*+ (3 - 2x)(x - 1) - 6 + 4x
= (3 - 2x)² + (3 - 2x)(x - 1) - 2(3 - 2x)
= (3 – 2x)[(3 – 2x) + (x – 1) – 2]
= (3 – 2x)(3 – 2x + x – 1 – 2)
= (3 – 2x)(- 1x)

Bonjour, j'ai besoin d'aide pour 2 factorisations:

Q(x) = (2x - 3)2 + (3 - 2x)(x - 1) - 6 + 4x

S(x) = 49x2 - 28x + 4 - (4x2 + 28x + 49)

Merci
yannou29

besoin d'aide svp !!

ah oui ok :p Q(x) = (2x - 3)2*+ (3 - 2x)(x - 1) - 6 + 4x = (3 - 2x)² + (3 - 2x)(x - 1) - 2(3 - 2x) = (3 – 2x)[(3 – 2x) + (x – 1) – 2] = (3 – 2x)(3 – 2x + x – 1 – 2) = (3 – 2x)(- 1x) je comprend vraiment rien pour S(x) :( S(x) = 49x2*- 28x + 4 - (4x2*+ 28x + 49) = (7x – 2)2 – (2x + 7)2 = [(7x - 2) - ...

Je comprend pas comment on fait pour Q(x) :/ S(x) = 49x2*- 28x + 4 - (4x2*+ 28x + 49) = (7x – 2)2 – (2x + 7)2 = après je sais pas comment faire non plus T(x) = 4x2*- 1 - (3x + 5)(2x - 1) + 4x2*- 4x + 1 = (2x – 1)(2x + 1) – (3x + 5)(2x – 1) + (2x – 1)2 = (2x – 1)[(2x + 1) – (3x + 5) + (2x – 1)] = (2x...

P(x) = 9x2 - 12x + 4 + (6x - 4)(x + 1) + 3(x - 3)(3x - 2) = (3x - 2)2 + 2(3x - 2)(x + 1) + 3(x - 3)(3x - 2) = (3x - 2)[(3x - 2) + 2(x + 1) + 3(x - 3)] = (3x - 2)(3x - 2 + 2x + 2 + 3x - 9) = (3x - 2)(8x - 9) Q(x) = (2x - 3)2 + (3 - 2x)(x - 1) - 6 + 4x = - (3 - 2x)2 + (3 - 2x)(x - 1) - 2(3 - 2x) = (3 ...

a oui tien

O(x) = 3(2x - 1)(4x - 5) - 7(x - 1/2)(x + 1)
= 6(x - 1/2)(4x - 5) - 7(x - 1/2)(x + 1)
= (x - 1/2)[6(4x - 5) - 7(x + 1)]
= (x - 1/2)(24x - 30 - 7x - 7)
= (x - 1/2)(17x - 37)

O(x) = 3(2x - 1)(4x - 5) - 7(x - 1/2)(x + 1)
= 6(x - 1/2)(4x - 5) - 7(x - 1/2)(x + 1)
= (x - 1/2)[6(4x - 5) - 7(x + 1)]
= (x - 1/2)(24x - 25 - 7x - 7)
= (x - 1/2)(17x - 32)

Ok ok super! merci! :)

O(x) = 3(2x - 1)(4x - 5) - 7(x - 1/2)(x + 1)
= 5(x - 1/2)(4x - 5) - 7(x - 1/2)(x + 1)
= (x - 1/2)[5(4x - 5) - 7(x + 1)]
= (x - 1/2)(20x - 25 - 7x - 7)
= (x - 1/2)(13x - 32)

M(x) = (2x + 3)(5x + 3) - (8x + 12)(2x + 4) = (2x + 3)(5x + 3) – 4(2x + 3)(2x + 4) = (2x + 3)[(5x + 3) – 4(2x + 4)] = (2x + 3)(5x + 3 – 8x – 16) = (2x + 3)(- 3x - 13) N(x) = (5x + 1)(2x + 3) + (5x + 1)(x - 2) - (7x - 4)(10x + 2) = (5x + 1)(2x + 3) + (5x + 1)(x - 2) - 2(7x - 4)(5x + 1) = (5x + 1)[(2x...

ok ok merci :) après je t'envoi les autres: K(x) = 2(3x - 7) {au carrée} *- (3x - 7)(2x + 1) - 2(3x - 7)(3x + 1) = (3x – 7)[2(3x – 7) – (2x + 1) – 2(3x + 1)] = (3x – 7)(6x – 14 – 2x – 1 – 6x – 2) = (3x – 7)(- 2x - 17) L(x) = - 3(5 - 6x)(1 - x) + 2(2 + 3x)(6x - 5) - 4(5 – 6x) {au carrée} = - 3(5 – 6x...