Question

X^2 + 10X +25 =16 qual o resultado me ajudem por favor

Answer 1

X² + 10X +25 =16

x²+10x+25-16=0

x²+10x+9=0

a:1  b:10  c:9

Δ=b²-4.a.c

Δ=10²-4.1.9

Δ=100-36

Δ=64

x= $\frac{-b±√Δ}{2.a}$

x=$\frac{-10±√64}{2.1}$

x¹= $\frac{-10+8}{2}$= $\frac{-2}{2}$= -1

x²= $\frac{-10-8}{2}$= $\frac{-18}{2}$= -9

Resposta: {-9;-1}

Answer 2

x^2 + 10x + 25 = 16  

(x + 5)^2 = 16

x1  + 5 = 4

x1 = 4 - 5 = -1

x2 + 5 = -4

x2 = -4 - 5 = -9

S = (-1, -9)