It's not only algebra manipulation!

Algebra Level 4

x=1+12+11+12+⋱\begin{aligned} x = 1 + \dfrac{1}{2 + \dfrac{1}{1+ \dfrac{1}{2+ \ddots}}} \end{aligned}

Find (4x2−4)2+(8x3−10)4 \left( 4x^{2} - 4 \right)^2 + \left(8x^{3} - 10 \right)^4 .

Note: Can you do this without algebra manipulation?

Try another problem on my set Let's Practice
Fidel Simanjuntak by Fidel Simanjuntak
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