Dear Student, 11+x = 34 - 1x11+x = 3x - 44x 4x = 3x - 4 +3x2 -4x3x2 - 5x -4 = 0x = 5 ±25 +4×3×42×3 = 5±736 Regards,

solve que 11 (ii)

Dear Student,

\frac{1}{1 + x} = \frac{3}{4} - \frac{1}{x} \frac{1}{1 + x} = \frac{3 x - 4}{4 x} 4 x = 3 x - 4 + 3 x^{2} - 4 x 3 x^{2} - 5 x - 4 = 0 x = \frac{5 \pm \sqrt{25 + 4 \times 3 \times 4}}{2 \times 3} = \frac{5 \pm \sqrt{73}}{6}

Regards,