Is it possible to get multiple correct answers for a mathematical expression? Why or why not

Sure quite possible

Step-by-step explanation:

Suppose the expression is

y = x^2 + 4x + 3

Suppose you want the expression to = 0. That means y = 0

There are two solutions that work

x = - 3

x = - 1

You have more than 1 answer. Both are correct for what you want to do.

Try it to see if it works.

y = (-3) ^2 + 4 (-3) + 3

y = 9 - 12 + 3

y = 0