Question

Identify the errors made in the finding the inverse of y= x^2 +12x

X= y^2+12x
Y^2= x- 12x
Y^2 = -11x
Y=√11x, for x greater than or equal to 0

Answer 1

9514 1404 393

Answer:

y was not substituted for every x

Explanation:

To find the inverse of ...

y = f(x)

you need to solve ...

x = f(y)

Here, f(x) = x^2 +12x, so f(y) = y^2 +12y

This is not the expression we see on the right of ...

x = y^2 +12x

Apparently y was not properly substituted into f(x).