Askor claimed: I assumed trigonometric substitution only operate if there is obtainable a square root like ##sqrt x^2 + 2 ##. No. Trig substitution is helpful When you have the sum or difference of squared conditions - they needn't be inside of a square root. These diligently made attributes make https://gabletoppak.com/why-gable-top-cartons-are-making-a-splash-in-the-water-industry/