Đáp án:
$=\dfrac{-19}{50}$
Giải thích các bước giải:
$\dfrac{4^4×3^6-2^{12}×3^5}{4^6×9^3+8^3×3^5}$
$=\dfrac{2^{8}×3^6-2^8×2^4×3^5}{2^{12}×3^6+2^9×3^5}$
$=\dfrac{2^8×(3^6-2^4×3^5)}{2^8×2^4×3^{6}+2^9×3^5}$
$=\dfrac{2^8×[3^5×(3-2^4)]}{2^9×(2^3×3^{6}+3^5}$
$=\dfrac{2^8×[3^5×(3-2^4)]}{2^9×[3^5×(2^3×3+1)]}$
$=\dfrac{3-2^4}{2×25}$
$=\dfrac{-19}{50}$
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