Question

X la2-6x+8 <=3
Cum se rezolva?

Answer 1

x²-6x+8≤3
x²-6x+8-3≤0
x²-6x+5≤0
x²-6x+9-4≤0
(x-3)²-2²≤0
(x-3+2)(x-3-2)≤0
(x-1)(x-5)≤0
x-1≤0      x≤1     x={0,1}
x-5≤0      x≤5     x={0,1,2,3,4,5}