Saved Bookmarks
| 1. |
alf a : 24 VJ , 6= 2.15 find a 2-62-V52+V5 |
|
Answer» a^2-b^2a^2=(2+√5/2-√5)^2=4+5+4√5/4-+5-4√5=9+4√5/9-4√5b^2=(2-√5/2+√5)^2=4+5-4√5/4+5+4√5=9-4√5/9+4√5hence subtracting9+4√5/9-4√5-(9-4√5/9+4√5)(9+4√5)^2-(9-4√5)^2/81-80=81+80+81+80=160+162=322 |
|