Solve each of the following equations:
– x2 + x – 2 = 0
It is given in the question that,
- x2 + x - 2 = 0
Now, comparing the given value with ax2 + bx + c = 0 where a = - 1, b = 1 and c = - 2
Thus, 
= 
= 
= 
Hence, the value of x should be 
and 
4