Question

(z^2+4)/(3z^2+7)=1/2 for a positive value of z

Answer 1

Answer:

Step-by-step explanation:

(z²+4)/(3z²+7)=1/2

cross multiplication

⇒2(z²+4)=1(3z²+7)

⇒2z²+8=3z²+7

⇒3z²+7-(2z²+8)=0

⇒z²-1=o

⇒z²=1

⇒z=√1

⇒z=±1

∴the positive value of z=1