Question

Can anyone tell the answer of 8th one... pls. right answer will be marked as brainliest and wrong answer will be reported.

Answer 1

Using the values given,

$= 4 {x}^{2} - 2 {y}^{2} - {z}^{2}$

$= 4 \times {(2)}^{2} - 2 \times {( - 2)}^{2} - {(3)}^{2}$

$= 4 \times 4 - 2 \times 4 - 9$

$= 16 - 8 - 9$

$= - 1$