If f : R → R and g : R → R defined by f(= 2x + 3 and g(= x2 + 7, then the value of x for which f(g(x)) = 25 is
A. ±1
B. ±2
C. ±3
D. ±4
Answer:B
If f : R → R and g : R → R defined by f(= 2x + 3 and g(= x2 + 7, then the value of x for which f(g(x)) = 25 is
A. ±1 B. ±2 C. ±3 D. ±4