Question

X elevado a 2 + 2x - 8 = 0

Answer 1

x^2+2x-8=0

x^2+2x=8

x^2+2x+1=8+1

(x+1)^2=9

x+1=√9

x+1=3

x=3-1

x=2

x'+x=-b/a

x'+x"=-2/2

x'+x"=-1

x"=-1-x'


x"=-1-2

x"=-3

s={-3,2}

espero ter ajudado!

boa noite!

Answer 2

x² +2x -8 = 0
(x -2). (x +4) = 0
x'=2.....x"= -4