Question

dav public school class 8th find the positive value
plz bol do plz​

Answer 1

Answer:

2

may be

plzz mark as Brainlist

Answer 2

$\frac{3 {z}^{2} + 7 }{4 + {z}^{2} } = 2 \\ 2(3 {z}^{2} + 7) = 4 + {z}^{2} \\ 6 {z}^{2} + 14 = 4 + {z}^{2} \\ 6 {z}^{2} - {z}^{2} = 4 - 14 \\ 5 {z}^{2} = - 10 \\ {z}^{2} = - \frac{10}{5} \\ {z}^{2} = - 2 \\ z = \sqrt{ - 2}$