Find the set of values of x for which the functions f(x) = 3x2 – 1 and g(x) = 3 + x are equal.
f(x)=3x2 -1;g(x)=3+x
For
3x2 -1=3+x
3x2 -x-4=0
(3x-4)(x+1)=0
3x-4=0 orx+1=0