Question

resolva a equação (x+2)²+x=0

URGENTEE '

Answer 1

Olá,

(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 c=4

Δ=b²-4.a.c

Δ=5²-4.1.4

Δ=25-16

Δ=9

x=-b+-√Δ ÷ 2.a

x= -5+-√9 ÷ 2.1

x= -5+-3 ÷ 2

x'= -5+3 ÷ 2 = -2 ÷ 2 = -1

x''= -5-3 ÷ 2 = -8 ÷ 2 = -4

S = {-1 ; -4}

Espero ter ajudado!!!