## sakigirl 2 years ago Find the inverse of..?

1. sakigirl

|dw:1359613928022:dw|

2. manishsatywali

let y = $\sqrt{x-4}$

3. manishsatywali

square both the sides to get y^2 =x-4

4. jsolon7

change the equation to $x=\sqrt{y-4}$ and solve for y

5. manishsatywali

take -4 on the left side

6. sakigirl

But the -4 is in the rt

7. manishsatywali

u get y^2+4 = x

8. manishsatywali

replace x by y and y by x u will get the inverse

9. jsolon7

what he said

10. sakigirl

Still a bit confused with what you do with the -4

11. manishsatywali

i have added +4 on both sides so that -4 gets cancel on the right hand side

12. sakigirl

So I get 4+x=sqrt y

13. manishsatywali

14. manishsatywali

after this cancel -4 and +4 on right hand side

15. sakigirl

@manishsatywali Thank you :)

16. manishsatywali

alwaz welcum