Question

X elevado ao quadrado menos 5x + 8 = 0

Answer 1

x^2-5x+8= 0
x^2-x-4x+8=0

x(x-1)-4(x-2)= 0

x-1= 0
x'= 1.


x-2= 0
x"= 2.

S= [(1,2)].