Sagot :
Bonsoir
Réduis les expressions suivantes.
A= 16x + 7 - 9x + 2 = 16x - 9x + 7 + 2 = 7x + 9
B = 5z + 4,5 - 2 + 0,5 = 5z - 3
C = 3 + 4t + 12t - 77 - 3 = 16t - 77
D = 5x2 + 4 + 2x2 - 1 = 7x² + 3
E = 15t2 - 4t2 +212 + 9 = 11t²+ 221
F = 12x + 8x2 - 9x - x2 = 7x² + 3x.
Bonjour !
Réponse :
A = 7x + 9
B = 5z + 3
C = 16t - 77
D = 7x² + 3
E = 11t² + 221
F = 7x² + 3x
Explications étape par étape :
A = 16x + 7 - 9x + 2
A = 7x + 7 + 2
A = 7x + 9
B = 5z + 4,5 - 2 + 0,5
B = 5z + 5 - 2
B = 5z + 3
C = 3 + 4t + 12t - 77 - 3
C = 16t + 3 - 77 - 3
C = 16t + 3 - 80
C = 16t - 77
D = 5x² + 4 + 2x² - 1
D = 7x² + 4 - 1
D = 7x² + 3
E = 15t² - 4t² +212 + 9
E = 11t² + 212 + 9
E = 11t² + 221
F = 12x + 8x² - 9x - x2²
F = 7x² + 12x - 9x
F = 7x² + 3x