Question

If 4n-5=21 then (7n-8)^2=?
169 ain't the answer​

Answer 1

Step-by-step explanation:

1406.25

in first equation my value of n is coming 13/2....

Answer 2

Answer: hence 169 isn't the answer

Step-by-step explanation:

4n-5=21

4n=26

n=26/4=13/2

Substitute n=13/2 in equation 2

(7*13/2 - 8)^2

=(91/2 - 8)^2

= (37.5)^2 = 1406.25