Question

2x² + x -2 = 8 find the value of x ?​

Answer 1

Answer:

x=-5/2,3

Step-by-step explanation:

$2 {x}^{2} +x - 2 = 8 \\ = > 2 {x}^{2} + x - 10 = 0 \\ = > 2 {x}^{2} - 4x + 5x - 10 \\ = > 2x(x - 2) + 5(x - 2) \\ = > (2x + 5)(x - 2)$

$therefore \: x = \frac{ - 5}{2} \\ x = 2$