Bonsoir,
A = (2x + 3)/(x + 1) - 4(x + 1)/(x + 1)
A = (2x + 3 - 4x - 4)/(x + 1)
A = (-2x - 1)/(x + 1)
B = 5x(x - 2)/(x - 2) - 2/(x - 2)
B = (5x^2 - 10x - 2)/(x - 2)
C = 1/(x + 3) - 1/x
C = x/[x(x + 3)] - (x + 3)/[x(x + 3)]
C = (x - x - 3)/[x(x + 3)]
C = -3/[x(x + 3)]
D = x^2/(x - 1) - x
D = x^2/(x - 1) - x(x - 1)/(x - 1)
D = (x^2 - x^2 + x)/(x - 1)
D = x/(x - 1)
E = (x + 1)/(x + 4) + (x - 2)/((x - 3)
E = [(x + 1)(x - 3)]/[(x + 4)(x - 3)] + [(x - 2)(x + 4)]/[(x - 3)(x + 4) je te laisse finir le calcul :)
Exercice 30 :
Developper :
A = x^2 - (3 + x)^2
A = x^2 - 9 - 6x - x^2
A = 6x - 9
B = (a - 2)^2 - (a - 4)^2
B = a^2 - 4a + 4 - (a^2 - 8a + 16)
B = -4a + 8a + 4 - 16
B = 4a - 12
C = (2b + 1)^2 + (2 + b)^2
C = 4b^2 + 4b + 1 + 4 + 4b + b^2
C = 5b^2 + 8b + 5
[tex]D = (3 - 2U)(u - \sqrt2)[/tex]
[tex]D = 3U - 3\Sqrt2 - 2u^2 + 2u\sqrt2[/tex]
E = (x + 1)(x + 2)(x + 3)
A toi de jouer ;))
