Question

The function f is defined by:f(x)=x squared+ax+b

it's known that f(0)=7 and f(-2)=17

find values of a and b

Answer
A=-3
B=​7
Question
Use values of a and b to solve this equations
f(x)=35

​

Answer 1

a=0 ,b=35

Explanation:

in the function of f(x)=35

first the function is a constant function. because it's form is just like this f(x)=b

and in the constant function a=0

it is just like this the function was f(x)=ax+b

if a=0 we have already lost the variable x because 0*x=0

so a=0 & b=35

i think it is clear. i hope it will help you