Question

Let f(x) = x2 − 3x − 7. Find f(−3).

Answer 1

Answer: The required value of f(-3) is 11.

Step-by-step explanation: We are given a function f(x) as follows :

`f(x)=x^2-3x-7~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(i)`

We are to find the value of f(-3).

To find f(-3), we must substitute x = -3 in equation (i).

From equation (i), we get

`f(-3)\\\\=(-3)^2-3*(-3)-7\\\\=9+9-7\\\\=18-7\\\\=11.`

Thus, the required value of f(-3) is 11.