Question

Resolva a equação de segundo grau
(x+2)²+X-0

Answer 1

(x+2)² +x=0

x² +4x +4 +x=0

x²+5x+4=0

x1+x2= -5

x1•x2= 4

x1= -1

x2= -4

Answer 2

(x+2)²+x—0

(x+2)(x+2)+x=0

x²+2x+2x+4+x=0

x²+5x+4=0

a=1 ; b=5 e c=4

∆=5²—4•1•4

∆=25—16

∆=9

x'=(-5+3)/2•1

x'=-2/2=-1

x''=(-5-3)/2•1

x''=-8/2

x''=-4

dúvidas?!Comente!!