Question

subtract 2 x square - 5 X Y + 3 y square + 5 from 4 x square + 3 x y - 5 y square + 9​

Answer 1

$(4 {x}^{2} + 3xy - 5 {y}^{2} + 9) - (2 {x}^{2} - 5xy + 3 {y}^{2} + 5) \\ 2 {x}^{2} + 8xy + 4 \\ 2( {x}^{2} + 4xy + 2)$

hope it helps.