а) (6x^2 - 2x) + (5 + 10x - 5x^2) =6x^2 - 2x + 5 + 10x - 5x^2 =(6x^2 - 5x^2) + (-2x + 10x) + 5 =x^2 + 8x + 5
б) (6xy + 8y) - (2xy + 8y - 1) =6xy + 8y - 2xy - 8y + 1 =(6xy - 2xy) + (8y - 8y) + 1 =4xy + 1
а) (6x^2 - 2x) + (5 + 10x - 5x^2) =
6x^2 - 2x + 5 + 10x - 5x^2 =
(6x^2 - 5x^2) + (-2x + 10x) + 5 =
x^2 + 8x + 5
б) (6xy + 8y) - (2xy + 8y - 1) =
6xy + 8y - 2xy - 8y + 1 =
(6xy - 2xy) + (8y - 8y) + 1 =
4xy + 1