Question

X elevado a 2 - 5 X+8 para =2

Answer 1

x^2-5x+8
2^2-5.2+8
4-10+8
-6+8
2

Answer 2

x²-5x+8=2
x²-5x+6=0
∆=25-4.1.6
∆=25-24
∆=1

5±√∆
....2

x1=5+1=6/2=3
.......2

x2=5-1=4/2=2
........2

r:x é igual a 3 ou 2