\(\left\{x^2-\left[6^2-\left(8^2-9\cdot7\right)^3-7\cdot5\right]^3-5\cdot3\right\}^3=1\)
\(\Rightarrow x^2-\left[6^2-\left(8^2-9\cdot7\right)^3-7\cdot5\right]^3-5\cdot3=1\)
\(\Rightarrow x^2-\left[36-\left(64-63\right)^3-35\right]^3-15=1\)
\(\Rightarrow x^2-\left[36-1^3-35\right]^3-15=1\)
\(\Rightarrow x^2-0-15=1\)
\(\Rightarrow x^2=1+15\)
\(\Rightarrow x^2=16\)
\(\Rightarrow x^2=4^2\)
\(\Rightarrow x=4\)
Vậy x =4
Đúng 0
Bình luận (0)
