What is 3X^2-7=11

Answer 1

It is an equation.

Are you supposed to find the value of X?

If so, try starting with
3X^2 -18 = 0
which is equivalent to saying
X^2 - 6 = 0
Try factoring it, to get the value of X.

Answer 2

3X^2-7=11
3x^2 = 18
x^2 = 6
x = ± √6