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3²⁰ x (3³)¹⁰ = 3²⁰ x 3³⁰ = 3⁵⁰
2.
|x+2| ≥ 0
x + 2 ≥ 0 v x + 2 ≤ 0
x ≥ -2 v x ≤ -2
x ∈ R
3.
r = √[(x₂ - x₁)² + (y₂ - y₁)²] = √(36 + 100) = √136 = 2√34