Hello, please consider the following.
a) You need to replace x by -1.
[tex]f(-1)=4*1-3*(-1)+5=4+3+5=12[/tex]
b) You need to replace x by 2t and simplify.
[tex]f(2t)=4*(2^2t^2)-3*(2t)+5=16t^2-6t+5[/tex]
c) You need to replace x by t-2 and develop, and simplify.
[tex]f(t-2)=4(t-2)^2-3(t-2)+5\\\\=4(t^2-4t+4)-3t+6+5\\\\=4t^2-16t+16-3t+11\\\\=4t^2-19t+27[/tex]
Thank you.
