Bonjour,
Exercice 5
x(x²+x+1) +1)
Exercice 7
2(5x+2 + x+1) =12010
10x+4 +2x +2 = 120
12x+6 = 120
12x= 120 -6
12x =114
x= 114/12 =9,5
exercice 8
x+x+1+x+2+x+3 = 4x + 6
4x+6 = 610
4x= 510 -6 = 504
x= 504/4 = 126
=>126, 127,128,129
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Bonjour,
Exercice 5
x(x²+x+1) +1)
Exercice 7
2(5x+2 + x+1) =12010
10x+4 +2x +2 = 120
12x+6 = 120
12x= 120 -6
12x =114
x= 114/12 =9,5
exercice 8
x+x+1+x+2+x+3 = 4x + 6
4x+6 = 610
4x= 510 -6 = 504
x= 504/4 = 126
=>126, 127,128,129