Askor claimed: I thought trigonometric substitution only do the job if there is obtainable a sq. root including ##sqrt x^two + two ##. No. Trig substitution is helpful When you've got the sum or big difference of squared conditions - they needn't be within a sq. root. Gabletop Pak presents https://gabletoppak.com/kerala-high-court-says-not-to-use-plastic-bottles-at-weddings-in-state/