Em tham khảo;
$(x-5)^{6}=(x-5)^4$
⇔$(x-5)^{6}-(x-5)^4=0$
⇔$(x-5)^{4}(x^2-10x+25-1)=0$
⇔\(\left[ \begin{array}{l}(x-5)^4=0\\x^2-10x+24=0(1)\end{array} \right.\)
⇔\(\left[ \begin{array}{l}x=0\\x^2-10x+24=0(1)\end{array} \right.\)
(1)
⇔$x^{2}-10x+24=0$
⇔$(x-4)(x-6)=0$
⇔\(\left[ \begin{array}{l}x=4\\x=6\end{array} \right.\)
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