Practicing Success
Practicing Success
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Solution of the inequality |2x| ≥ |8-2x| is |
(-∞, -2] [-2, ∞) [2, ∞) (-∞, 2) |
[2, ∞) |
|2x| ≥ |8-2x| Squaring both side. (2x)2 ≥ (8-2x)2 ⇒ 4x2 ≥ 64 + 4x2 - 32x ⇒ 32x ≥ 64 ⇒ x ≥ 2 ⇒ x ∈ [2, ∞) |
