Question

1) (2x + 3y) - (4x + 5y) - (10 - 4y)=

2) (2x la puterea a 2 -xy) - (xy + 5y la puterea a 2) - (x la puterea a 2 - y la puterea a 2)=

DAU COROANA!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer 1

...............................coroana

Answer 2

$1)(2x + 3y) - (4x + 5y) - (10 - 4y)$

$= 2x + 3y - 4x - 5y - 10 + 4y$

$= - 2x + 2y - 10$

$= 2( - x + y - 5)$

$2)( {2x}^{2} - xy) - (xy + {5y}^{2} ) - ( {x}^{2} - {y}^{2} )$

$= {2x}^{2} - xy - xy - {5y}^{2} - {x}^{2} + {y}^{2}$

$= {x}^{2} - {4y}^{2} - 2xy$