Respuesta :
The answer is 23.
Given : 3x^2-4 for x=-3
(-3) x (-3) = 9
9 x 3 = 27
27 - 4 = 23
Given : 3x^2-4 for x=-3
(-3) x (-3) = 9
9 x 3 = 27
27 - 4 = 23
[tex]3x^2-4\ for\ x=-3.\\\\\text{Put the value of x to the expression}\\\\3(-3)^2-4=3(9)-4=27-4=23\\\\Answer:\ \boxed{23}[/tex]