[(x+2y)²]⁴·(x+2y)²
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[(x+2y)²]⁴·(x+2y)²
[(x+2y)²]⁴·(x+2y)²
[(x+2y)²]⁴·(x+2y)²
[(x+2y)²]⁴·(x+2y)²
=(X+2Y)^(2×4)×(X+2Y)^2
=(X+2Y)^8×(X+2Y)^2
=(X+2y)^(8+2)
=(X+2Y)^10