Question

find f(-1) for f(x)= 3x^2 + 5x +6

Answer 1

  The answer is:  "4" .
__________________________________________________
                 "  f(-1) = 4 ."
______________________________________
Explanation:
______________________________________
Given:  " f(x) = 3x² + 5x + 6 " ;

Then plug in "-1" for all values of "x" to find "f(-1)" ;

     →  f(-1)  =  3(-1)²  +  5(-1)  +  6  ;

                  = 3(1)  + (-5) + 6 ;

                  =  3 - 5 + 6 ;

                  =  -2 + 6 = 4 .
__________________________________________________
  The answer is:  "4" .
__________________________________________________
                 "  f(-1) = 4 ."
__________________________________________________