Question

pls answer it fast to be a brainleast

Answer 1

Answer:

$a {x}^{2} + b {y}^{2} - c {z}^{2} = 6.$

Step-by-step explanation:

$a {x}^{2} + b {y}^{2} - c {z}^{2} = ( - 2)( {1}^{2} ) + (0) {( - 1)}^{2} - ( - 2)( {2)}^{2} \\ \\ = - 2 + 8 \\ \\ = 6.$