Sagot :
2*= au carré
5x(-1)2* - 3x(-1) +9 = 5-((-3)+9)= 5-6 = -1
6x(-1)2* - 8x(-1) +2 = 6-(-8+2)= 6-(-6)= 12
5x(-1)2* - 3x(-1) +9 = 5-((-3)+9)= 5-6 = -1
6x(-1)2* - 8x(-1) +2 = 6-(-8+2)= 6-(-6)= 12
Bonsoir,
Calculer pour x = 1 :
A = 5x²-3x+9
A = 5×(-1²)-3×(-1)+9
A = 5×(-1)-3(-1)+9
A = 5×(-1)+3+9
A = -5+3+9
A = -2+9
A = 7
Calculer pour x = 1
B = 6x²-8x+2
B = 6×(-1²)-8×(-1)+2
B = 6×(-1)-8×(-1)+2
B = 6×(-1)+8+2
B = -6+8+2
B = -6+10
B = 4
Bonne soirée.