Question

The function F is defined by f(x)=x^2-5x+6. What is the value of f(4)?

Answer 1

2

Explanation:

f(4) = 4^2-5(4) + 6

= 2

Answer 2

`f(x)=x^2-5x+6`

↝ f(4) equals to substituting x = 4 in the equation.

Thus,

`f(4)=4^2-5(4)+6\\f(4)=16-20+6\\f(4)=22-20\\f(4)=2`

Therefore, f(4) = 2