Constrained and u constrained optimization , where s.a = subject to

1) 2 = 4 x 2 + 3 xy + 64 2 Xty - 56 2- 23 X + 147x -549 412 4 7 = x7 - 3 4 2 - X 2 + 6y 5 ) 2 = 2x -5 - 6x + 3 y 6 2 2 5 x 2 +69 - Xy X+ 29 - 21