Question

Solve y3 = 1.
answers are
y = −1
y = 1
y = ±1
y = 3

Answer 1

Is y3 supposed to be y^3? Is so, the answer is 1.

Explanation:

If the equation is correct as written, 3y = 1, then y = 1/3

y^3 = 1

This can also be written as y^2*y = 1

1. If y = -1, then y^2y would be (1)*(-1) = -1

2. If y = 1, then (1)^3 * (1) = 1 This works.

3. If y = ±1, then -1 is a possible answer and -1 does not work as per #1

4. 3^3 = 27