(a2+24a+144)÷(a+12)
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(a²+24a+144)÷(a+12)
={(a)²+2×a×12+(12)²}÷(a+12)
=(a+12)²÷(a+12). [a²+2ab+b²=(a+b)²]
=(a+12)(a+12)÷(a+12)
=a+12(answer)
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