Question

1,4xy2+5xy+0,25-(xy-1,8xy2+0,75)-(3,2y2x -3xy) якщо, ху=-1

Answer 1

Ответ:

$4x {y}^{2} + 5xy + 0.25 - (xy - 1.8x {y}^{2} + 0.75) - (3.2 {y}^{2} x - 3xy) = 4x {y}^{2} + 5xy + 0.25 - xy + 1.8x {y}^{2} + 0.75 - 3.2x {y}^{2} + 3xy = 2.6x {y}^{2} + 4xy + 1 = - 2.6y - 4 + 1 = - 2.6y - 3$