Question

if a = 4x - 3y + z , b = 2x + 5y - 4z and c = 6x -7y +2z find -a-b-c​

Answer 1

Answer:

here is the answer in the attachment.

Answer 2

Answer:

$given \: \\ a = 4x - 3y + z \\ b = 2x + 5y - 4z \\ c = 6x - 7y + 2z \\ now \: \\ - a - b = - (4x - 3y + z) - (2x + 5y - 4z) \\ = - 4x + 3y - z - 2x - 5y + 4z \\ = - 6x - 2y + 3z \\ now \\ ( - a - b) - c = - 6x - 2y + 3z - (6x - 7y + 2z) \\ = - 12x + 5y + z$

Step-by-step explanation:

Hope this helps you mate, wish you all the best.