Question

Equação do 2° grau

(x+5)²=25

Answer 1

(x+5)2=25
x2+25+10x=25
x2+10x=25-25
x2+10x

Answer 2

Olá PacoteOestudioso,

( x + 5 )^2 = 25
x^2 + 2 . x . 5 + 5^2 = 25
x^2 + 10x + 25 = 0
x^2 + 10x + 25 - 25 = 0
x^2 + 10x = 0             Delta: b^2- 4ac
a.1                             Delta: 10^2 - 4 . 1 . 0
b.10                           Delta: 100 - 0
c.0                             Delta: 100

X = -b + - raiz de delta / 2 . a
X' = -b + raiz de delta / 2 . a
X' = -10 + 10 / 2 . 1
X' = 0
-------------------------------------
X" = -b - raiz de delta / 2 .a
X" = -10 - 10 / 2 . 1
X" = -20.

Espero ter ajudado, bons estudos!