📐 MathLevel 3 — 🟢 BasicAlgebra👁 20 views⏱ 1 min read
Giải: Rút gọn biểu thức: A = (x + 2)² - (x - 2)².
📝 Problem
Rút gọn biểu thức: $A = (x + 2)^2 - (x - 2)^2$.✨Detailed Solution
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