prezzysam prezzysam
  • 23-11-2020
  • Mathematics
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Express x ⩽ −5 or x ⩾ −1 in the form ∣x+a∣ ⩾ b​

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elcharly64
elcharly64 elcharly64
  • 23-11-2020

Answer:

[tex]\mid x+3\mid\ge 2[/tex]

Step-by-step explanation:

Inequalities

The  solution for the inequality:

[tex]\mid x+a\mid\ge b[/tex]

Can be expressed as:

[tex]x+a\ge b[/tex]

OR:

[tex]x+a\le -b[/tex]

Subtracting a to both inequalities:

[tex]x\ge b-a[/tex]

[tex]x\le -b-a[/tex]

Comparing to the given solutions, we have:

[tex]b-a=-1[/tex]

[tex]-b-a=-5[/tex]

Adding both equations:

[tex]-2a=-6[/tex]

Solving:

a=3

b=2

Thus, the required inequality form is:

[tex]\mathbf{\mid x+3\mid\ge 2}[/tex]

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