1.a) sqrt(2x-1) + sqrt(2x-x) = 2 (sqrt inseamna radical)sqrt(2x-1) + sqrt(x) = 2 /^2 (/^2 inseamna ridicam la puterea a doua)2x-1 + 2sqrt[(2x-1)*x] + x = 43x + 2sqrt[2*x*x -x] = 52sqrt(2*x^2) = 5-3x /^24 * 2*x*x = 25 - 30x + 9x8x^2 + 21x - 25 = 0delta = 21*21 + 800 = 441 + 800 = 1241x1 = (-21 + sqrt(1241))/2*8x2 = (-21 - sqrt(1241))/2*8 S = {(x1,x2)} (S inseamna solutia)