Question

how much should 4 x square + Y square + 4 x y be increased to get x square minus y square + 3 square​

Answer 1

Answer:

$4 {x}^{2} + {y}^{2} + 4xy - ( {x}^{2} - {y}^{2} + {3}^{2} ) \\ = 3 {x }^{2} + 4xy - 9$