Bonsoir est ce que vous pouvez m'aider svp ce sont deux exercices de maths : 1- Reduire ,si possible ,les expressions suivantes: A=3*10x B=-t^2*(-5) C=10a^2*(-1) D= -3t*(-5t) E=a^2 +9 F=2x^2+9x^2 G=-8t-(-7t) H=-5a+9a^2 I=-4y-8y
2-Developper et reduire chacune des expressions litterales suivantes:
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Bonsoir,A = 3. * 10x = 30x
B = -t^2 * (-5) = 5t^2
C = 10a^2 * (-1) = -10a^2
D = -3t * (-5t) = 15t^2
E = a^2 + 9 => irréductible
F = 2x^2 + 9x^2 = 11x^2
G = -8t - (-7t) = -8t + 7t = -t
H = -5a + 9a^2 = a(-5 + 9a)
I = -4y - 8y = -12y
Exercice 2 :
A = 9x * 8 = 72x
B = 4 * 8x = 32x
C = 6x + 10 * (-6x + 2) = 6x - 60x + 20 = -54x + 20
D = 10 * (-8x - 4) + 2x + 2 = -80x - 40 + 2x + 2 = -78x - 38
E = -3 + (3x + 5) * 10 = -3 + 30x + 50 = 30x + 47