Question

For what values of x is the expression below defined?
VX + 4 = V1- x

Answer 1

A

Explanation:

A square root must be positive or equal to 0

x + 4 ≥ 0

x ≥ -4

1-x > 0

-x > - 1

x < 1

If we unite the two solutions, we have

-4 ≤ x < 1