Q1 of 82 Page 121

If f(x) = x2 + 9x – 6, then let us write by calculating the values of f(0), f(1) and f(3).

Formula used/Theory.


Putting the value of ‘x’ in f(x) gives out the value of f(x) on ‘x’


We have,


f(x) = x2 + 9x – 6


When we put


x = 0


Then,


f(0) = 02 + 9 × 0 – 6


f(0) = –6


when we put


x = 1


Then,


f(1) = 12 + 9 × 1 – 6


f(1) = 10 –6


f(1) = 4


When we put


x = 3


Then,


f(3) = 32 + 9 × 3 – 6


f(3) = 9+27 –6


f(3) = 30


Conclusion.


The values of f(0), f(1), f(3) are –6, 4, 30 respectively.


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