Question 34674
Ok for problem number 1


the first step to find f(2)


whenever you see x you will replace it with (2)



problem: f(x) =2x -11, find f(2)



1.) 2(2)-11=-7


so the answer is f(2)=-7


The second problem is 


1st step you will need to drop the Parenthesis


for the first two Parenthesis and distribute the negative throught all the problems in the third Parenthesis 


1.)5x2-3x+2-3x2-5x-8-x2-3x+10 



2.)4x2-3x+2-3x2-5x-8-3x+10


3.)x2-3x+2-5x-8-3x+10



4.)x2-6x+2-5x-8+10



5.)x2-11x+2-8+10



6.)x2-11x-6+10


The last step answer is x2-11x+4


The third problem is :(5x-8)(x-7)

is to distribute so we  have 5x2-35x-8x+56
the answer is 5x2-43x+56


Lastly, use the distributive property

which is 8x3+4x2+4x+4x+2x2+x+1

answer is 8x3+6x2+9x+1

let me know if you understand this or need  more clarifications on these problems.