Question 147158
1. If f(x)=4x^2-3x+2, find f(-1)
All you need to do is replace x with -1 and solve:
f(x)=4x^2-3x+2
f(-1)=4(-1)^2-3(-1)+2
f(-1)=4+3+2
f(-1)=9
.
2. State the domain of f(x)=(x+3)/(x-1)
Domain specifies all values of x for this equation.
The ONLY time this equation will NOT be defined is IF the denominator (x-1) goes to zero. 
Therefore, to find where this equation is NOT defined set it to zero and solve:
x-1=0
x = 1
.
From the above, 
domain of x is "all real numbers EXCEPT 1"