Saved Bookmarks
| 1. |
Solve the equation 2 x^{2}+x-4=0 by the method of completingsquare |
|
Answer» 2x2+ x -4=02x2+ x = 4x2+ x/2 + 1/4 = 2+1/4(x + 1/2)2= 9/4(x + 1/2) = ± 3/2x = 3/2 - 1/2 = 1orx = 3/2 + 1/2 = 2Hence, x = 1 or 2 |
|