Askor explained: I believed trigonometric substitution only get the job done if there is available a square root including ##sqrt x^2 + 2 ##. No. Trig substitution is helpful For those who have the sum or change of squared terms - they needn't be inside a sq. root. Customization: Understanding https://gabletoppak.com/how-white-labeling-water-bottles-can-elevate-your-brand-identity/