Toán Lớp 8: ( x- 2).(x2 – 2x + 4 )(x+2) (x2 +2x +4) đề bài là :rút gọn nha
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Toán Lớp 8: ( x- 2).(x2 – 2x + 4 )(x+2) (x2 +2x +4) đề bài là :rút gọn nha
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Gửi bạn xin hn
\left( {x – 2} \right)\left( {{x^2} – 2x + 4} \right)\left( {x + 2} \right)\left( {{x^2} + 2x + 4} \right)\\
= \left( {x – 2} \right)\left( {{x^2} + 2x + 4} \right)\left( {x + 2} \right)\left( {{x^2} – 2x + 4} \right)\\
= \left( {{x^3} – 8} \right)\left( {{x^3} + 8} \right)\\
= {\left( {{x^3}} \right)^2} – {8^2}\\
= {x^6} – 64
\end{array}$