X5 x3 x x2 2. 3(X-2)=X+2. (X-3)(X+3). X_X 2. (2x-3)(2x+3). (X+5)^2-(X-5)^2. 2x+10=2-x. |X^2+7x|=4x+10. (7x+4)4x(5-2x). X^2/3-X=2x/3-x. (X-2)^3. 2^X=3^X. X2/x+3=2x+3/x+3. 4x2=32x. X2-4x-32=0. (X+32)(X-4)>=0. (X^2 + 32)/(X - 2). Y=3x3+2x2-7. Система y x2+2x