Solution: Square both sides: $ x^2 + 2 + \frac1x^2 = 25 \Rightarrow x^2 + \frac1x^2 = 23 $. Multiply by 2: $ 2x^2 + \frac2x^2 = 46 $. Final answer: $ \boxed46 $.Question: In a sustainable desert agriculture project, the combined water efficiency of two systems is modeled by $ a + b = 10 $ and $ a^2 + b^2 = 58 $. Determine the total water efficiency cubed, $ a^3 + b^3 $. - Groen Casting