Question

Quien pa que me ayude

Answer 1

Respuesta:

Explicación paso a paso:

1) 3b - (2b + a) = 3b - 2b - a = b - a

2) x - [2y - 2(x + 2y) + 5y] = x - [2y - 2x - 4y + 5y] = x -[ 3y - x] = x - 3y + x = 2x - 3y

3) 9y + [3x -(y + 4x)] = 9y + [3x - y - 4x] = 9y + [-x -y] = 9x -x - y = 8x - y

4) 4x - [9 - 4(3 - x)] = 4x - [ 9 - 12 + 4x ] = 4x - [ - 3 + 4x ] = 4x + 3 - 4x = 3

5) 3b - (-b - 2b - 4a ) - 4b = 3b - ( -3b - 4a) - 4b = 3b + 3b + 4a - 4b = 2b + 4a

6) - [ 6y³ - (y - y² + 6y - 8y³)]  = -[6y³ -( 7y - y² - 8y³)] = -[6y³ - 7y + y² + 8y³] = -[14y³ - 7y + y² ] = -14y³ + 7y - y²

7) 2(5x - y) - (7x + y) = 10x - 2y - 7x - y = 3x - 3y

8) 2y - [x - 2(x - y)] - [2y - (x + y)] = 2y - [x - 2x + y] - [2y -x - y] = 2y - [-x + y] - [y - x] = 2y + x - y - y + x = 2y + 2x - 2y = 2x