Question

Which equation is the inverse of y = x2 +4?

y =-VI- 4
b. y = x-4
a
Cy=Vx+4
d. y= -x - 4
Anyone know the answer

Answer 1

B.
`y=\pm√(x-4)`

Explanation:

Swap the positions of the x and y variables then solve for y again.

`y=x^2+4\\\\x=y^2+4\\\\x-4=y^2+4-4\\\\x-4=y^2\\\\√(x-4)=√(y^2)\\\\\pm√(x-4)=y`