SOLUTION: For all parts of this question use the function f(x)=2x^2-x+1 a) Evaluate the following and simplify the expression (i) f(a+1) (ii) f(3b)

Question 318104: For all parts of this question use the function f(x)=2x^2-x+1
a) Evaluate the following and simplify the expression

(i) f(a+1) (ii) f(3b)

This is what I have so far, I am not sure where to go from here:
f(a+1)=2(a+1)^2-(a+1)+1
= 2a^2+2^2-a-1+1

Any guidance would be appreciated...

Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
i)

Start with the given function.

Plug in

FOIL.

Distribute.

Combine like terms.

---------------------------------------------------
ii)

Start with the given function.

Plug in

Square 3b to get .

Multiply 2 and to get
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