Askor reported: I thought trigonometric substitution only get the job done if there is obtainable a sq. root which include ##sqrt x^two + two ##. No. Trig substitution is helpful In case you have the sum or variance of squared conditions - they needn't be within a square root. Front https://gabletoppak.com/why-gable-top-cartons-are-making-a-splash-in-the-water-industry/