Askor explained: I thought trigonometric substitution only function if there is accessible a sq. root which include ##sqrt x^two + 2 ##. No. Trig substitution is useful Should you have the sum or variance of squared phrases - they don't need to be inside of a square root. (Sports) To https://gabletoppak.com/how-white-labeling-water-bottles-can-elevate-your-brand-identity/