Unit 5: Algebraic Fractions — Exercise 5 4

5.4.1.(i) Solve: 5x^4 - 19x^2 + 12 = 0 (ii) Solve: 4x^4 - 27x^2 + 18 = 0 (iii) Solve: 5x^4 - 22x^2 + 8 = 0 (iv) Solve: 4*2^(2x+1) - 9*2^x + 1 = 0 (v) Solve: 4^(1+x) + 4^(1-x) - 10 = 0 (vi) Solve: 3^x + 3^(3-x) - 12 = 0 (vii) Solve: 5^(1+3x) + 5^(2-3x) - 126 = 0 (viii) Solve: (x^2 + 1/x^2) + 2(x + 1/x) - 33 = 0 (ix) Solve: 2(x^2 + 1/x^2) - 25(x - 1/x) - 17 = 0 (x) Solve: 2x^4 - 5x^3 - 14x^2 - 5x + 2 = 0 (xi) Solve: (x+1)(x+2)(x-4)(x-5) + 8 = 0 (xii) Solve: (x+3)(x+4)(x+5)(x+6) = -1