Saved Bookmarks
| 1. |
7-4y = 9, xy = 3 and Value of Gxt |
|
Answer» (7x-4y)=9 squaring both sides 49x²+16y²-56xy=81 add and SUBTRACT 56xy 49x²+16y²+56xy-112xy=81 (7x+4y)²=81+112xy (7x+4y)²=81+336 (7x+4y)²=417 |
|