Question

if a/b=7/4 then find the ratio of b^2-2a^2/b^2+2a^2​

Answer 1

Answer:

I think this is correct

Answer 2

Answer:

- 41/57

Step-by-step explanation:

a/b=7/4

a²/b²=49/16

let z=(b²-2a²) / (b²+2a²)

Dividing up and down by b²

z=( b²/b²-2a²/b²) / ( b²/b²+2a²/b²)

=(1-2*49/16) / (1+2*49/16)

=(16-98)/16 / (16+98)/16

=-82/114

= - 41/57