Question

ПОМОГИТЕ ПОЖАЛУЙСТА,ОЧЕНЬ НУЖНО

Answer 1

{|x|<7
{x²+4x-5>0

|x|<7
{x<7
{-x<7

{x<7
{x>-7
\\\\\\\\\\\\\\\\\\\\
------- -7 -------- 7 -------------
            \\\\\\\\\\\\\\\\\\\\\\\\\\\
x∈(-7; 7)

x²+4x-5>0
x²+4x-5=0
D=16+20=36
x₁=-4-6=-5
        2
x₂=-4+6=1
        2
     +             -              +
-------- -5 ---------- 1-------------
\\\\\\\\                       \\\\\\\\\\\\\\\\\
x∈(-∞; -5)U(1; +∞)

{x∈(-7; 7)
{x∈(-∞; -5)U(1; +∞)
             \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
-------- -7 ------- -5 ----------- 1 -------- 7 -----------
   \\\\\\\\\\\\\\\\\\\\                       \\\\\\\\\\\\\\\\\\\\\
x∈(-7; -5)U(1; 7)

Ответ: (-7; -5) U (1; 7)