Question

y é = x elevado à 2 - 6x+8

Answer 1

$y= x^{2} -6x+8$

$x^{2} -6x+8=0$

Δ=36-32
Δ=4
√Δ=√4
√4= ± 2

$x'= \frac{6+2}{2} = \frac{8}{2} =4$

$x"= \frac{6-2}{2} = \frac{4}{2} =2$

S={2,4}