Question

AyuuUdAA :( dados los polinomios
A=5x-8y+3z, B=10x+3y+z, C=5x-2y-5z
efectua:

1). A+B+C=

2). B-C=

3). B-(A+C)=​

Answer 1

Explicación paso a paso:

$a = 5x - 8y + 3z \\ b = 10x + 3y + z \\ c = 5x - 2y - 5z \\ \\ a + b + c \\ 5x - 8y + 3z + 10x + 3y + z + 5x - 2y - 5z = \\ 20x + 7y + 9z \\ \\ b - c \\ 10x + 3y + z - 5x - 2y - 5z = \\ 5x + x - 4z \\ \\ b - (a + c) \\ 10x + 3y + z -( 5x - 8y + 3z + 5x - 2y - 5z) = \\ 10x + 3y + z - (10x - 10y - 2z) = \\ - 7y - z$