Question

(iii) -2x2 + x + 1 = 0​

Answer 1

$- 2 \times 2 + x + 1 = 0 \\ - 4 + x + 1 = 0 \\ - 3 + x = 0 \\ x = 3$

hope it helps u ✌

Answer 2

Answer:

$- 2 {x}^{2} + x + 1 = 0 \\ 2 {x}^{2} - x - 1 = 0$

using quadratic formula u will get

$\frac{1 + \sqrt{ - 7} }{4} \: or \: \frac{1 - \sqrt{ - 7} }{4}$