samuellowe1998 samuellowe1998
  • 14-02-2017
  • Mathematics
contestada

Determine the solution set of (x + 2)2 = 36.

{6, -8}
{4, -8}
{4, -6}

Respuesta :

Аноним Аноним
  • 14-02-2017
(x + 2)^2 = 36
x^2 +4x + 4 = 36
x^2 +4x - 32 = 0
(x + 8)(x - 4)= 0

x+8 = 0
x = -8

x-4=0
x = 4

answer is 
{4, -8} (second choice)
Answer Link
boffeemadrid
boffeemadrid boffeemadrid
  • 28-02-2019

Answer:

(B)(4,-8)

Step-by-step explanation:

The given equation is:

[tex](x+2)^2=36[/tex]

Solving the above equation, we get

⇒[tex]x^2+4+4x=36[/tex]

⇒[tex]x^2+4x+4-36=0[/tex]

⇒[tex]x^2+8x-4x-32=0[/tex]

⇒[tex]x(x+8)-4(x+8)=0[/tex]

⇒[tex](x-4)(x+8)=0[/tex]

Thus, the solution is x=-8 and x=4.

Therefore, the solution set is (4,-8) and Option B is correct.

Answer Link

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