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- Evaluate the solution of: 2(D^2)I - 2Di – 4i=0. a. (Ae^t+Be^-2t)/2 b. (Ae^-t+Be^2t)/2 c. Ae^t+Be^-2t d. Ae^-t+Be^2tUse the trig substitution x=5 sin t, to re-write the square root sign of 25-x^2, without any square root. square root sign of 25-x^2=Explain why (sinx-2)(cosx + 2) = 0 has no solutions.