1. (a) [-1,7)U(4,∞)
(b) (-∞,-1.7) U (9,∞) U (0,0.2) U (-0.2,0.2) U (4,-0.2)
2. (a) (2/243x^(12)y^(-10))^(343)
(b) (x^(3)y^(4))/(2xy)^2 = (x^2y^3)/(4)
(c) sqrt(75) - sqrt(48) + 916
3. (a) 37x^2 -10
(x+3)(x+5)
(d) ((x^(3/2)) - (3x^(3/2)) + (4x^(1/2)) + (x^(3/2))
4. (a) All real numbers
(b) All real numbers
(c) x ≠ 1, x ≠ ±3
(d) All real numbers ≠ ±2
5. -s/(s^2 + 4s)
6. (a) No solution
(b) x = -1, 2
(c) x = ±2
(d) x = ±4
(e) x = -5, 3