Sagot :
Bonjour,
Si x=5, alors:
A= 3x + 4 + 6x-2 B=4 x (x+5)-3 C=(2x+3) 3+5
A=3*5+4+6*5-2 B=4*(5+5)-3 C=(2*5+3)*3+5
A=15+4+30-2 B=4*10-3 C=(10+3)*3+5
A=19+30-2 B=40-3 C=13*3+5
A=49-2 B=37 C=39+5
A=47 C=44
Réponse :
10) x = 5, Donc :
A = 3 x 5 + 4 + 6 x 5 - 2
= 15 + 4 + 30 - 2
= 19 + 30 - 2
= 49 - 2
= 47
B = 4 x (x + 5) - 3
= 4 x 10 - 3
= 40 - 3
= 37
C = (2 x 5 + 3) x 3 + 5
= (10 + 3) x 3 + 5
= 13 x 3 + 5 = 39 + 5
= 44.