Question

Can yall please help find the inverse of y=5x^2 -8? Thanks!!

Answer 1

Do you know the first step in finding the inverse of a function?

Answer 2

Hint: It has to do with the x and the y

Answer 3

x=5y^2-8 is the rirst step

Answer 4

switching the x and y

Answer 5

(x+8)/5=y^2

Answer 6

y=sqrt((x+8)/5)

Answer 7

@gabby13

Answer 8

im getting confused after adding the 8 to both sides... what do I do next?

Answer 9

@Loser66

Answer 10

@SolomonZelman

Answer 11

@AlexandervonHumboldt2 when someone is trying to help you, please, respect, don't tag others.

Answer 12

can someone help me?

Answer 13

Lets see if I can help
\[y=5x^2-8\]
\[x=5y^2-8\]
\[x+8=5y^2-8+8\]
\[(x+8)/5=(5y^2)/5\]
\[(x+8)/5=y^2\]
and to cancel the power of 2 on the y, we use the square root function
\[sqrt((x+8)/5)=sqrt(y^2)\]
\[sqrt((x+8)/5)=y\]

Answer 14

Thank you!!! You helped me so much!!!