Q. 173.5( 2 Votes )

Find the set of values of x for which the functions f(x) = 3x2 – 1 and g(x) = 3 + x are equal.

Answer :

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



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