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Solve cach equation. Remember to check for extraneous solutions. 21) V3x + 28 - V-2 -2x 22) V3n - 25 = V15-n A) (6) B) (5) A) (-7, 10) B) (-10) C) 1-6 1 D) (5. 6) C) (10. -10} D) (10) 23) b - 5 = V4b - 24 2) 1-7 ) B) (7 ) D) (-7, -10) Perform the indicated operation. 24) 8(n) = n - 4 25) f(a) = a3 - 502 - 20 h(n) = 2n3 - g(a) = 3a Find (g . h)(n) Find (f - g)(a) A) n*+ 4n3+ 3n2 A) -a + 502 + 50 B) 2n4 - 8n3 - n+ 4 B) a - 5a2 - 5a C) 4n4 - 4n3 - 8n+ 8 C) 3a2 + a+ 10 D) 2n4 + 8n3 + n+ 4 D) a3 + 5a2 - 5a 26) g(a) = 4a 27) g(x) =x+ 2 h(a ) = 30 f(x) = 3x -4 Find (8 - h)(a) Find (8 . f)(x) A) -a B) -2a + 9 A) 3x2 - 2x - 8 C ) a D) a3 - 2a + 3 B) 4x4 - 3x3 - 12x2 + 9x C) 9x 4+ 6x3 - 3x2 D) 3x2 + 2x - 8 Simplify each and state the excluded values. b - 1 28) - x + 2 6 2 + 66 - 7 29) x2 - 5x - 14 A) _ ; (-5) 1; 10, 9) A ) x + 7 ; (10 ) B) 36 B) x - 7; (-2) C) 3; (- 5 ) D) 1 b + 7 -; (1,-7) C) - 1 7; (10, -7) *+ 7 1 D) x - 7: 17 , -21 -3